The skipVersion decorator was proving to be tricky to use because
it took an application name which we didn't want to hard-code,
since it is in hacluster/tests.py. One alternative was to pass a
charm name instead of application name, but if there were mutiple
hacluster applications in the model (e.g. keystone-hacluster and
nova-hacluster) we would have to pick just one to test the package
version on. After further discussion we decided to change the
decorator to a function so that we could use existing class
variables to generate the desired hacluster application name.
95fcad2a0a