Cleap up remaining com.cisco in yangide code base

While working on YANGIDE-1 I've noticed that the current (as of today) yangide code base still has A LOT of "com.cisco" in it - I'm counting 2692 occurrences (findx.sh "com.cisco" | grep -v "/target/" | wc -l) ..

It appears that some prior effort has gone into renaming com.cisco.yangide to org.opendaylight.yangide, but that this has been only partially finished; e.g. there are projects called (as in .project) "org.opendaylight.yangide.com.cisco.yangide.yangparser" stored (as in filesystem directory name) in "yangide/plugins/com.cisco.yangide.yangparser"

The Java package names are also all still "com.cisco.yangide"

While this is certainly not blocking, it should probably still be cleaned up as some point as part of the move of this code into opendaylight.