m2eclipse aware

Please accept this pull request to make hawio source tree more m2e friendly.  Major changes are:
 
  1. Set m-compiler-plugin source and target to 1.6 ( other wise, eclipse would set to 1.5 and error out on some @override annotation

  2. Hookup necessary  lifecycle-mapping

Also please manually fix hawtio-web/src/test/resource/applicationContext.xml. I has duplicate 'firstStep' element
and eclipse error on this