Set the default JSONIPPolicy exclude range if config values not found
- default exclude is range -1, 3 (IPs .0, .1, .255)
Default json policy and test
Added tests for models.IPPolicy.get_ip_policy_rule_set

- Do not think the test should be passing.  But it is.  This will
allow us to write tests for that static method
Changed unit test mock of db_api to pull back correct information
Fix pep8 violation, unused variable
Merge pull request #157 from mpath/set_default_ip_policy_if_config_not_found

Set default ip policy if config not found