Add JRebel support

[poikilotherm]

For easier and faster development, JRebel seems to be a good choice.

The develop image should support it out of the box:

ENV JREBEL_LIB=/opt/dataverse/jrebel/lib/libjrebel64.so
RUN wget --no-verbose -O "${HOME_DIR}/jrebel.zip" http://dl.zeroturnaround.com/jrebel-stable-nosetup.zip && \
    unzip -q "${HOME_DIR}/jrebel.zip" -d "${HOME_DIR}"
RUN asadmin start-domain && \
    asadmin create-jvm-options "\-agentpath\:${JREBEL_LIB}" && \
    asadmin create-jvm-options "\-agentlib\:jdwp=transport=dt_socket,server=y,suspend=n,address=9009" && \
    asadmin create-jvm-options "\-Drebel.remoting_plugin=true" && \
    asadmin stop-domain

(This also includes debugger listening on port 9009)

An alternative with less functionality is the HotSwap Agent, which requires a patched JVM (DCEVM), which seems to have been stalled for JDK 8. Remains untested.