Revision 225379

Working on: MNG-521

o Cleaned up output from discovery of MavenProjectBuilder instance in MavenProjectTestCase.
o Added <relativePath/> to parent in maven.mdo (default value is '../pom.xml')
o Added filesystem parent-POM search using <relativePath/>...if discovered pom doesn't match the parent specification (g:a:v), then it's not used - the parent is resolved - and search for ancestor POMs on disk goes no further.

NOTE: Next thing is to reactor-ize the release plugin, then MNG-521 should be implemented.