Fix a use of in where it should be equality

The pattern for most other comparisons against name_or_id are if
name_or_id in (name, id) - but in this case, because we're doing the
name exclusion parameter as well, we split them. However, we kept the
in, even though it should be testing for equality. This can cause some
failures that make people sad.

Change-Id: If33bfe5c1e32b36c27c32cfcba4c07dcf01a4e74

shade/__init__.py

@@ -753,7 +753,7 @@ class OpenStackCloud(object):
             if image_id == name_or_id:
                 return image
             if (image is not None and
-                    name_or_id in image.name and (
+                    name_or_id == image.name and (
                     not exclude or exclude not in image.name)):
                 return image
         return None