Move suspend_available class variable into skip decorators

We shouldn't do a getattr on CONF in the class definition. It will cause
import errors if there isn't a config file. Just use
CONF.compute_feature_enabled.suspend in the skip decorator.

Change-Id: Ic3dc344affe6fd7d2fa102b5af53e36e79098263
Move pause_available class variable into skip decorators

We shouldn't do a getattr on CONF in the class definition. It will cause
import errors if there isn't a config file. Just use
CONF.compute_feature_enabled.pause in the skip decorator.

Change-Id: If24c45eba0ee466a00589806b27c736c0e8dba54
Merge "Move suspend_available class variable into skip decorators"
Merge "Move pause_available class variable into skip decorators"