Make use of Maven plugin org.jboss.jandex where appropriate.

subsystem-as7/subsystem-as7/pom.xml
  Removed dependency on deployers-core since the entire
   contents should be in the deployers project.
  We continue to external index all artifacts bundled that are not
   built from the tree of the snowdrop.git project.
Spring version bumps (3.2.x, 3.1.x, 3.0.x, 2.5.x)

3.2.x  3.2.0.RELEASE => 3.2.2.RELEASE spring-*
       1.6.8         => 1.7.1         aspectj
3.1.x  3.1.0.RELEASE => 3.1.4.RELEASE spring-*
3.0.x  3.0.6.RELEASE => 3.0.7.RELEASE spring-*
2.5.x  2.5.6.SEC02   => 2.5.6.SEC03   spring-*

Notes:
 3.2.x might have a minimum of apectj version 1.6.12 see EBR-877
  but the pom.xml for 3.2.x indicates 1.7.1 is needed.
Merge pull request #14 from dlmiles/for_master

2 commits, see also SNOWDROP-67