Utilizes assertIsNotNone

Using assertTrue and the 'is not' operator to test if an element
is not None is too python2.4. Our unit testing framework supports
assertIsNotNone, included from python 2.7, which was created
for these types of tests.

Change-Id: I25c3f2b144357a3f86625deb8e324d78c20b9ce4
Merge "Utilizes assertIsNotNone"