dist: allow specify JVM options from sysconfig (#93)
dist: allow specify JVM options from sysconfig (#93)

Add SCYLLA_JMX_JVM_OPTS on sysconfig to specify JVM options.

Reviewed-by: Ľuboš Koščo <c65f69575be4fcd8974431832bd44ac185e9c551@scylladb.com>

Fixes #58
scylladb/scylla-jmx,scylladb/scylla-jmx,scylladb/scylla-jmx