Various bug-fixes for MAD subsystem:
- install.sh: 2 unneeded files were copied and then replaced by the generic poll_xen_kvm.rb file.
- CommandManager.rb: Fix for retry condition.
STATUS changed to STATE. The core couldn't identify the current state before.
Deletion of quotes for values. This prevented the core from parsing correctly the monitoring values.
Fix for hypervisor auto-detection.