feature #1685: continue on error if step has defined :no_fail
(cherry picked from commit 6294f0b1b23953d7ed999b8ddb70bde4788f4379)
feature #1685: Adds a new cleanup operation to VMM driver. It cancels the VM and removes all associated files, the operations are synchronized
feature #1685: Epilog delete commands are generated in a separated function
feature #1685: Clean network in CLEANUP. Adds cleanup_action to VMM. Make use of new action in LCM
feature #1685: CLEANUP_PREVIOUS action to cleanup previous hosts for migrate operations. Integrate CLEANUP actions with LCM. New state CLEANUP_DELETE.
feature #1685: Add sleeps to dummy actions. Add NOP response to action list for dummy driver
feature #1685: Fix bug in dummy driver
feature #1685: Fix minor bugs in VMM driver and TM
feature 1685: Fix wrong delete/resubmit when a VM was in FAILURE
feature #1685: Better management of delete/resubmit on CLEANUP_DELETE state. Add new state to OCA bindings
Feature #1685: Add new vm states to xsd files
Merge remote-tracking branch 'origin/feature-1685b'