Fixed tense consistency (used past) in statuses

In several places in Watcher, there are statuses which corresponds
to a status in the respective life cycle. There were used past tense
everywhere, except "SUCCESS" which was written in present tense.

So I searched for all the occurences of this state, and replaced them
with their past tense form.

Change-Id: Ic41def96d1a608da06a1e394e24704d4f06ab32a
Closes-Bug: #1520276

watcher/applier/framework/command_executor.py

@@ -64,7 +64,7 @@ class CommandExecutor(object):
                     return False
                 else:
                     self.deploy.populate(primitive)
-                    self.notify(action, Status.SUCCESS)
+                    self.notify(action, Status.SUCCEEDED)
             except Exception as e:
                 LOG.debug(
                     'The applier module failed to execute the action{0}  with '

watcher/applier/framework/messaging/launch_action_plan.py

@@ -59,7 +59,7 @@ class LaunchActionPlanCommand(ApplierCommand):
             LOG.error("Launch Action Plan " + unicode(e))
         finally:
             if result is True:
-                status = Status.SUCCESS
+                status = Status.SUCCEEDED
             else:
                 status = Status.FAILED
             # update state