Use 2013.1 for Grizzly release version info in setup.py

setup.py does not have a default version number specified.

Fixes Bug: #1129620

Change-Id: I4fd0ae02ad445aa1bdd25a67aead1e52fd731e3e
Missing policy json files from tarball

The tarball is missing files:
heat/tests/policy/deny_stack_user.json
heat/tests/policy/notallowed.json

Fixes: bug #1130119

Change-Id: I4614c759044e0eedb9dab5f7cbe8d71f4cbdc38e
heat engine : avoid returning empty resource error strings

Avoid the possibility of returning an empty string (when Exceptions
have not got a string message), or parser.py will treat the error
as success and the resource operation failure will not be correctly
reflected in the resource state.

fixes bug 1130270

Change-Id: I1c55dea1f9615cd4b037802ff8c1066694bffea6
Merge "Use 2013.1 for Grizzly release version info in setup.py"
Merge "Missing policy json files from tarball"
Merge "heat engine : avoid returning empty resource error strings"