Fixes for Issue #293.
Changes made:
1. Fixes test cases for lazy/eager fetching.
2. Added fix for proxy check over java assist instances.
3. Modified Schema configuration.java for export schema only after table infos for all persistence units are loaded.
4. Corrected javassist maven dependency.
[PATCH] use org.sonatype.nosql groupId for patched artifact
[PATCH] remove dependency on artifacts from non-central repo
[PATCH] implement Query.getSingleResult
[PATCH] fix Enum handling
[PATCH] fix kundera-cassandra tests under Maven