Add ussuri package version and pin Jinja2 wheel

Add the ussuri major package version.
Pin Jinja2 to the last versions supporting python 3.4 for trusty.

Change-Id: I163c7780e24993794433a19f1c4ac26252b90539

src/lib/charm/openstack/aodh.py

@@ -113,6 +113,7 @@ class AodhCharm(charms_openstack.charm.HAOpenStackCharm):
             ('7', 'rocky'),
             ('8', 'stein'),
             ('9', 'train'),
+            ('10', 'ussuri'),
         ]),
     }
 

src/wheelhouse.txt

@@ -1,3 +1,3 @@
-
-jinja2
+# pin Jinja2 to the last versions supporting python 3.4 for trusty
+Jinja2<=2.10.1
 psutil