variables and tables comparison broken for ApplicationService

[juliantaylor]

the comparison of the variables and tables in the ApplicationService in the equality operator is broken when the length of the lists change:
https://github.com/f5devcentral/f5-cccl/blob/master/f5_cccl/resource/ltm/app_service.py#L62

        if not all(v in self._data['variables']
                   for v in other.data['variables']):

This comparison will fail when the other list is shorter than the self list.
This breaks the for example update using the k8s-bigipcontroller see F5Networks/k8s-bigip-ctlr#1038

[juliantaylor]

simple fix is to compare the length of the lists for equality first