scheduler system test scenarios
test for mutiple policies to execute at the same instance
skipping cron tests
refactor the header validation, setup and using constants
changes fetch url from config for dev and preprod
changes to links test
clean up scripts
changes to server metadata
negative test time.now
updated cloudcafe version
manisht reviews + negative test for update policy type
adding more cooldown validations

clean up within scripts
skip the cron tests
change to create_at_style and unskipped cron tests
removed at_style now test
Merge branch 'master' into auto-416-scheduler-system-tests
moved date-T test from negative to positive test
changes to links test
Merge branch 'master' into auto-416-scheduler-system-tests
Merge pull request #260 from rackerlabs/auto-416-scheduler-system-tests

Auto 416 scheduler system tests (ready for review)