Heisenbug in DataNormalizerTest

On MacOS 10.9.3 (verified on 3 machines) with Java 1.7, the DataNormalizerTest fails because the comparator provided in verifyLegacyNode() does not actually provide a total ordering of the childData and childNodes.

It appears as though Windows and Linux are immune.

This results in a build failure for sal-common-impl that looks like this:

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T E S T S
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Running org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizerTest
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Tests run: 10, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.892 sec <<< FAILURE! - in org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizerTest
testToLegacyNormalizedNode(org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizerTest) Time elapsed: 0.068 sec <<< FAILURE!
java.lang.AssertionError: Child node QName expected:<(urn:opendaylight:params:xml:ns:yang:controller:md:sal:normalization:test?revision=2014-03-13)inner-list> but was:<(urn:opendaylight:params:xml:ns:yang:controller:md:sal:normalization:test?revision=2014-03-13)id>
at org.junit.Assert.fail(Assert.java:91)
at org.junit.Assert.failNotEquals(Assert.java:645)
at org.junit.Assert.assertEquals(Assert.java:126)
at org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizerTest.verifyLegacyNode(DataNormalizerTest.java:437)
at org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizerTest.verifyLegacyNode(DataNormalizerTest.java:441)
at org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizerTest.testToLegacyNormalizedNode(DataNormalizerTest.java:245)