Adding get_counts method to ScalingGroupCollection
remove check for deleted key in _cql_count_for_tenant
remove check for deleted key from test_cass_models
add get_counts to mock interface
semicolon is more than semi important
including scheduler helper to behavior

negative tests for scheduler
negative tests for scheduler for real
functional tests for scheduler
added negative test: add webhook for scheduler policies
added test for execute scheduler
uncommented some tests
changed per reviews
changes per reviews
chnages to delete scheduler test
changes per review
AUTO-405: Only zulu-format UTC time allowed

Allowing only UTC iso datetime. Also disallowing past dates fixing AUTO-404
skipping tests with known issues, changes to setUp
reviews
Merge pull request #243 from rackerlabs/scheduler_tests

Scheduler tests (ready for review)
Merge pull request #255 from rackerlabs/schedule_at_fixes

AUTO-405: Only zulu-format UTC time allowed