HPCC-10131: Add support for optional 'jvmlibpath' property in environment.conf; add additional error checking to JVM initialization.
Merge pull request #4907 from dcamper/master

HPCC-10131: Add support for optional 'jvmlibpath' property in environment.conf; add additional error checking to JVM initialization.

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>