parser/caching test: fix deprecation warnings
Newer python.unittest prefers assertNotEqual() over assertNotEquals():
caching.py:143: DeprecationWarning: Please use assertNotEqual instead.
Signed-off-by: Steve Beattie steve.beattie@canonical.com
Newer python.unittest prefers assertNotEqual() over assertNotEquals():
caching.py:143: DeprecationWarning: Please use assertNotEqual instead.
Signed-off-by: Steve Beattie steve.beattie@canonical.com