Add POWERVM_STARTING state to powervm driver

In current implementation in powervm driver, the 'Starting' state
of an instance is not supported. This patch adds this to the powervm
driver and allows execution to continue until the instance is in a
'Running' state instead of failing out.

This patch fixes Bug #1084641

blueprint powervm-compute-enhancements

Change-Id: Ieb17b215547e77ee8d13b18496ba4090fc45757b

nova/virt/powervm/constants.py

@@ -18,11 +18,13 @@
 
 POWERVM_NOSTATE = ''
 POWERVM_RUNNING = 'Running'
+POWERVM_STARTING = 'Starting'
 POWERVM_SHUTDOWN = 'Not Activated'
 POWERVM_POWER_STATE = {
     POWERVM_NOSTATE: power_state.NOSTATE,
     POWERVM_RUNNING: power_state.RUNNING,
     POWERVM_SHUTDOWN: power_state.SHUTDOWN,
+    POWERVM_STARTING: power_state.RUNNING
 }
 
 POWERVM_CPU_INFO = ('ppc64', 'powervm', '3940')

nova/virt/powervm/operator.py

@@ -74,7 +74,8 @@ def get_info(self, instance_name):
         """
         lpar_instance = self._get_instance(instance_name)
 
-        state = constants.POWERVM_POWER_STATE[lpar_instance['state']]
+        state = constants.POWERVM_POWER_STATE.get(
+                lpar_instance['state'], power_state.NOSTATE)
         return {'state': state,
                 'max_mem': lpar_instance['max_mem'],
                 'mem': lpar_instance['desired_mem'],