6706662: Remove workaround introduced in fix for 6624782
Summary: Remove workaround compiler options for instanceKlass.cpp and objArrayKlass.cpp.
Reviewed-by: ysr, jcoomes
6703308: Fix jprt.properties to allow for jdk6 and jdk7 builds
Summary: Allows for jprt submit -release option to select jdk version and proper build targets.
Reviewed-by: jcoomes