While trying to verify fix for https://bugs.opendaylight.org/show_bug.cgi?id=5731, noticed that when PCRpt with missing LSP-IDENTIFIERS TLV is received, error message with type=6 value=11 is generated now, but it is not getting sent out (i.e. not seem in wireshark capture)

On further debugging by adding more log messages etc., it is seen that below exception is received when trying to send the message out, because of which it fails

2016-06-03 21:29:37,437 | INFO | oupCloseable-6-3 | Stateful07PCReportMessageParser | 298 - org.opendaylight.bgpcep.pcep-ietf-stateful07 - 0.5.2.Beryllium-SR2 | >>>>> validateLsp: creating error message...
2016-06-03 21:29:37,443 | INFO | oupCloseable-6-3 | Stateful07PCReportMessageParser | 298 - org.opendaylight.bgpcep.pcep-ietf-stateful07 - 0.5.2.Beryllium-SR2 | >>>>> getValidReports: object is Ero [_subobject=[Subobject [_subobjectType=IpPrefixCase [_ipPrefix=IpPrefix [_ipPrefix=IpPrefix [_ipv4Prefix=Ipv4Prefix [_value=1.1.1.1/32], _value=[1, ., 1, ., 1, ., 1, /, 3, 2]], augmentation=[]], augmentation=[]], _loose=false, augmentation=[]]], _ignore=false, _processingRule=false, augmentation=[]]
2016-06-03 21:29:37,443 | INFO | oupCloseable-6-3 | Stateful07PCReportMessageParser | 298 - org.opendaylight.bgpcep.pcep-ietf-stateful07 - 0.5.2.Beryllium-SR2 | >>>>> validateLsp: here1
2016-06-03 21:29:37,443 | INFO | oupCloseable-6-3 | Stateful07PCReportMessageParser | 298 - org.opendaylight.bgpcep.pcep-ietf-stateful07 - 0.5.2.Beryllium-SR2 | >>>>> validateLsp: here3
2016-06-03 21:29:37,444 | INFO | oupCloseable-6-3 | PCEPByteToMessageDecoder | 289 - org.opendaylight.bgpcep.pcep-impl - 0.5.2.Beryllium-SR2 | >>> errors: [Pcerr [_pcerrMessage=PcerrMessage [_errors=[Errors [_errorObject=ErrorObject [_type=6, _value=11, augmentation=[]], augmentation=[]]], augmentation=[]], augmentation=[]], Pcerr [_pcerrMessage=PcerrMessage [_errors=[Errors [_errorObject=ErrorObject [_type=6, _value=8, augmentation=[]], augmentation=[]]], augmentation=[]], augmentation=[]]]
2016-06-03 21:29:37,444 | INFO | oupCloseable-6-3 | PCEPByteToMessageDecoder | 289 - org.opendaylight.bgpcep.pcep-impl - 0.5.2.Beryllium-SR2 | >>> handling error messages...
2016-06-03 21:29:37,444 | INFO | oupCloseable-6-3 | PCEPByteToMessageDecoder | 289 - org.opendaylight.bgpcep.pcep-impl - 0.5.2.Beryllium-SR2 | >>> handling error message Pcerr [_pcerrMessage=PcerrMessage [_errors=[Errors [_errorObject=ErrorObject [_type=6, _value=11, augmentation=[]], augmentation=[]]], augmentation=[]], augmentation=[]]
2016-06-03 21:29:37,445 | INFO | oupCloseable-6-3 | PCEPByteToMessageDecoder | 289 - org.opendaylight.bgpcep.pcep-impl - 0.5.2.Beryllium-SR2 | Failed to send message
java.lang.UnsupportedOperationException: unsupported message type: PcerrBuilder$PcerrImpl (expected: ByteBuf, FileRegion)
at io.netty.channel.nio.AbstractNioByteChannel.filterOutboundMessage(AbstractNioByteChannel.java:282)[53:io.netty.transport:4.0.33.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.write(AbstractChannel.java:711)[53:io.netty.transport:4.0.33.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.write(DefaultChannelPipeline.java:1122)[53:io.netty.transport:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:643)[53:io.netty.transport:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:700)[53:io.netty.transport:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:636)[53:io.netty.transport:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:622)[53:io.netty.transport:4.0.33.Final]
at org.opendaylight.protocol.pcep.impl.PCEPByteToMessageDecoder.decode(PCEPByteToMessageDecoder.java:66)[289:org.opendaylight.bgpcep.pcep-impl:0.5.2.Beryllium-SR2]
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:360)[54:io.netty.codec:4.0.33.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:244)[54:io.netty.codec:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)[53:io.netty.transport:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)[53:io.netty.transport:4.0.33.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:276)[54:io.netty.codec:4.0.33.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:263)[54:io.netty.codec:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)[53:io.netty.transport:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)[53:io.netty.transport:4.0.33.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:846)[53:io.netty.transport:4.0.33.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)[53:io.netty.transport:4.0.33.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)[53:io.netty.transport:4.0.33.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)[53:io.netty.transport:4.0.33.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)[53:io.netty.transport:4.0.33.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)[53:io.netty.transport:4.0.33.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112)[52:io.netty.common:4.0.33.Final]
at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)[52:io.netty.common:4.0.33.Final]
at java.lang.Thread.run(Thread.java:745)[:1.7.0_95]
2016-06-03 21:29:37,446 | INFO | oupCloseable-6-3 | PCEPByteToMessageDecoder | 289 - org.opendaylight.bgpcep.