fixed postgresql flavor-create

fixes bug 968190
nova flavor-create failed on postgresql DB
because sqlalchemy tried to write an integer into a varchar field

Change-Id: Ib47d8d10e96fedb2158f454503fe1ca3493c16bb
Signed-Off-By: Bernhard M. Wiedemann <bwiedemann suse.com>

Authors

@@ -75,6 +75,7 @@ Hisaki Ohara <hisaki.ohara@intel.com>
 Ilya Alekseyev <ilyaalekseyev@acm.org>
 Isaku Yamahata <yamahata@valinux.co.jp>
 Ivan Kolodyazhny <e0ne@e0ne.info>
+J. Daniel Schmidt <jdsn@suse.de>
 Jake Dahn <jake@ansolabs.com>
 James E. Blair <jeblair@hp.com>
 Jason Cannavale <jason.cannavale@rackspace.com>

nova/compute/instance_types.py

@@ -66,7 +66,9 @@ def create(name, memory, vcpus, root_gb, ephemeral_gb, flavorid, swap=None,
             raise exception.InvalidInput(reason=msg)
 
     kwargs['name'] = name
-    kwargs['flavorid'] = flavorid
+    # NOTE(vish): Internally, flavorid is stored as a string but it comes
+    #             in through json as an integer, so we convert it here.
+    kwargs['flavorid'] = unicode(flavorid)
 
     try:
         return db.instance_type_create(context.get_admin_context(), kwargs)