heat : fix glanceclient deprecation warning

glanceclient module name changed for F18, so do
a conditional import which should import the correct
version provided one is available (tested on F17/F18)

Fixes #251

Change-Id: I095560f29a408949a7d54795fc000c094b1d63b9
Signed-off-by: Steven Hardy <shardy@redhat.com>

heat/tests/functional/util.py

@@ -33,7 +33,10 @@ from nose.plugins.attrib import attr
 from nose import with_setup
 from nose.exc import SkipTest
 
-from glance import client as glance_client
+try:
+    from glanceclient import client as glance_client
+except ImportError:
+    from glance import client as glance_client
 from novaclient.v1_1 import client as nova_client
 import heat
 from heat import utils

heat/utils.py

@@ -21,7 +21,10 @@ import base64
 from lxml import etree
 import re
 
-from glance import client as glance_client
+try:
+    from glanceclient import client as glance_client
+except ImportError:
+    from glance import client as glance_client
 from heat.common import exception
 
 from heat.openstack.common import log as logging