(PDB-88) Fail on JDK version 1.6

Previously we would write to log and standard error a deprecation
warning message. I switched that to continue to log the error, but
then exit immediately.
Remove the option of a JDK 1.6 RPM dependency
Bump the redhat JDK dep for acceptance tests to 1.7.0
Merge pull request #853 from senior/ticket/master/pdb-88-fail-on-jdk6

(PDB-88) Fail on JDK version 1.6