Change target JVM to 1.6
Fixes to the repository bundle.

* The bundle now includes the org.jboss.osgi.spi package. It has a
dependency on this package and it is not available as a standalone
bundle.
* Corrected the exported version number of org.osgi.service.repository
  package.
Updates for Repository 1.1

The API was updated following discussion in the EEG.
This commit includes the updated API and modifications of the
implementation to work with it.