* refactoring (rename 'fast_provision' to 'provision', 'provision' to 'watch_provision_progress' and more)
* fix bug with ignoring node status for provision operation (+ test);
* small test refactoring.
* rescue StandartError instead of Exception;
* small refactoring reboot_events private method.
Return StopIteration for RHOS logic
Remove logic: do not provision node what already provisioned/ready
Merge pull request #77 from warpc/astute_refactoring

Astute refactoring (method names for provision)