change assert(Not)Equals to assert(Not)Equal

According to http://docs.python.org/2/library/unittest.html
assert(Not)Equals is a deprecated alias of assert(Not)Equal.

Change-Id: If90709756ccb6022641b915e47a5c7af4fe1fc1c
Closes-Bug: #1329757
Merge "change assert(Not)Equals to assert(Not)Equal"