Change yang-maven-plugin to write yang files to build output

    Made a minor change to YangToSourcesProcessor, used by the yang
    maven plugin, to alleviate unit tests failures when running in
    Eclipse when a test tries to load the SchemaContext for a DataObject class.
    It ends up looking for the yang file under target-ide/classes/META-INF/yang but
    it's under target. It's copied there by YangToSourcesProcessor but it
    hard-codes the build output dir to "target". I kept this behavior
    but also copied the yang files to the actual build output dir that gets
    passed in (it's "target-ide" when in Eclipse) if it differs from "target".

Change-Id: I84cb47e2c90f99a8dba70c8e92a9720d8617e58b
Signed-off-by: tpantelis <tpanteli@brocade.com>
Merge "Change yang-maven-plugin to write yang files to build output"