HPCC-11126 Uninitialized warning in java embed plugin

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #5634 from richardkchapman/java-uninit

HPCC-11126 Uninitialized warning in java embed plugin

Reviewed-By: Jamie Noss <james.noss@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>