Port r4666: Override any Xms set in JAVA_OPTS when invoking the jruby bash script.  Fixes #881.
Port r4666: Override any Xms set in JAVA_OPTS when invoking the jruby bash script.  Fixes #881.

Only done for the Unix invocation of jruby because jruby.bat doesn't seem to have the same bug.

git-svn-id: 4b387fe5ada7764508e2ca96c335714e4c1692c6@4670 0d517254-b314-0410-acde-c619094fa49f

NUBIC/psc-mirror,NUBIC/psc-mirror,NUBIC/psc-mirror,NUBIC/psc-mirror