Make sure we compare flavor IDs as ints

We were comparing an int to a string and getting things wrong, so
idempotence was lost. This forces the comparison to be int.

library/rax

@@ -124,7 +124,7 @@ def cloudservers(module, state, name, flavor, image, meta, key_name, files,
     for server in pyrax.cloudservers.list():
         if  name != server.name:
             continue
-        if flavor != server.flavor['id']:
+        if int(flavor) != int(server.flavor['id']):
             continue
         if image != server.image['id']:
             continue