changed JPA dependency to provided

+ made JPA dependency implicit since the aspect will always require the JPA classes during the weaving process

+ changed jpa dependency scope from optional to provided

SPR-6538: context-support is no longer marked as an optional dependency within aspects and webmvc POMs

Modified staticmethod mocking to remove compile-time dependency on JUnit (see ROO-314 and related issues)

SPR-6119 - Add slf4j dependency back to orm's pom.xml but in test scope as it is needed to run tests that use Hibernate
SPR-5956 - Remove commons-logging dependency definitions in pom.xml for all but spring-core so as to make exclusion rule easier for user who use slf4j

Place parent pom in publicly accessible directory (org.sf.spring-parent).  
Create a component list pom in org.sf.spring-library.

SPR-5385, SPR-5301 - initial pass completed of POMs for maven central repository upload. N.B. Can not build spring with these POMs.
Cleanup remains to meet maven central metadata requirements