[Hawkular-dev] Property passing into Hawkular(-metrics)

Hey, currently one can pass properties/options like the C* to use via -Dkey=value pairs to standalone.sh/bat This is a bit cumbersome and also does not work in cases, where the command line is set at "compile time" like in a Dockerfile, but the property needs to be set at run time (when docker run a pre-made image). There would be the option to set JAVA_OPTS before starting the script, but JAVA_OPTS is a) something that may apply to multiple java programs on a machine and is thus not specific b) inside standalone.conf not additive, so one has to repeat all the options from standalone.conf on JAVA_OPTS So I propose hat we add (similar to RHQ) some HAWKULAR_OPTS that are additive to JAVA_OPTS. We need to modify standalone.sh/bat to source them (and keep the modified versions in our git repo. Alternatives could be - create wrapper scripts that set JAVA_OPTS and call standalone.sh, but that only indirectly solves [1] - as the WildFly team to add some WF_LOCAL_OPTS in upcoming releases. I fear that may take too long. Opinions? [1] https://issues.jboss.org/browse/HAWKULAR-288