SolidFire API RequestID is useless.

The SolidFire API can take an int or a string for a request-id,
when using an int however it needs to actually be a valid int.

The driver currently was doing an int(uuid) which is too large and
as a result get's truncated making it difficult or impossible to track
request-ids.

This patch chanes the generate request-id to form a hash of the uuid so
that it can be tracked.

Fixed bug: 1199198

Change-Id: I38d5e3d189e679678898c329a9fa173a47853d47

cinder/volume/drivers/solidfire.py

@@ -117,7 +117,7 @@ def _issue_api_request(self, method_name, params):
         # can't be re-used
         retry_count = 5
         while retry_count > 0:
-            request_id = int(uuid.uuid4())  # just generate a random number
+            request_id = hash(uuid.uuid4())  # just generate a random number
             command = {'method': method_name,
                        'id': request_id}