glance/cinder/quantum counter units are not accurate/consistent

change floating ip counters to 'ip' unit
change volume.size counters to 'GB' unit
change image.[update/upload/delete] counters to 'image' unit

Change-Id: Icdb92b3edf08d9cf9ea555b3bdfe7d452dd3ffff
Fixes:bug1173287

ceilometer/image/notifications.py

@@ -89,7 +89,7 @@ class ImageCRUD(ImageCRUDBase):
             counter.Counter(
                 name=message['event_type'],
                 type=counter.TYPE_DELTA,
-                unit='event',
+                unit='image',
                 volume=1,
                 resource_id=message['payload']['id'],
                 user_id=None,

ceilometer/network/notifications.py

@@ -70,11 +70,12 @@ class NetworkNotificationBase(plugin.NotificationBase):
         LOG.info('network notification %r', message)
         message['payload'] = message['payload'][self.resource_name]
         metadata = self.notification_to_metadata(message)
-        counter_name = getattr(self, "counter_name", self.resource_name)
+        counter_name = getattr(self, 'counter_name', self.resource_name)
+        unit_value = getattr(self, 'unit', self.resource_name)
 
         yield counter.Counter(name=counter_name,
                               type=counter.TYPE_GAUGE,
-                              unit=self.resource_name,
+                              unit=unit_value,
                               volume=1,
                               user_id=message['_context_user_id'],
                               project_id=message['payload']['tenant_id'],
@@ -88,7 +89,7 @@ class NetworkNotificationBase(plugin.NotificationBase):
             yield counter.Counter(name=counter_name
                                   + "." + event_type_split[1],
                                   type=counter.TYPE_DELTA,
-                                  unit=self.resource_name,
+                                  unit=unit_value,
                                   volume=1,
                                   user_id=message['_context_user_id'],
                                   project_id=message['payload']['tenant_id'],
@@ -189,3 +190,4 @@ class FloatingIP(NetworkNotificationBase):
 
     resource_name = 'floatingip'
     counter_name = 'ip.floating'
+    unit = 'ip'

ceilometer/volume/notifications.py

@@ -88,7 +88,7 @@ class VolumeSize(_Base):
         return [
             counter.Counter(name='volume.size',
                             type=counter.TYPE_GAUGE,
-                            unit='B',
+                            unit='GB',
                             volume=message['payload']['size'],
                             user_id=message['payload']['user_id'],
                             project_id=message['payload']['tenant_id'],