CLOUDIFY-2621 - resolving the old version number separately.
CLOUDIFY-2671 - Trigger clean-up after machine failure during failover routine
CLOUDIFY-2621 - client-server version validation set through the env var CLOUDIFY_VERSION_OPTIONS
Build version advanced to 6204-30
CLOUDIFY-2696 - improve error message thrown on quota validation
CLOUDIFY-2695 - Agent discovery use of admin should be limited to relevant events