Modified stack.sh to support Janus plugin for agent nodes as well
   - Now use Q_PLUGIN=janus
Added support for fv-agent
   - Updated ctrl-localrc and agent-localrc's to include fv-agt
   - Updated stack.sh script to start fv-agt if enabled
        - Must add "fv-agt" to ENABLED_SERVICES list
Fixed bug in lib/janus file for setting sql connection address