ENG-6085: The catalog compilation verifier in VoltCompiler needs to
use the ClassLoader from the jarfile generated in the first pass of
the compiler so that it can find stored procedure and import classes
- Make stored procedures based on inner classes actually work.
- Don't use org.voltdb in the TestVoltCompiler import tests
ENG-6085: Wrap all the catalog manipulation in a try/catch, return
unexpected errors to callers.
- Some comment cleanup
- Improve an error message.  Remove some bad logging output.
- Delete commented out test that will be covered soon
ENG-6085: Add initial CREATE/DROP PROCEDURE tests for java stored
procedures.
Merge pull request #1593 from VoltDB/eng6085-createproc2

Eng6085, r=jhugg