Fix the mergebot config for 1.11
Fix the mergebot config for 1.11

* Fix the mergebot config for 1.11
* Remove 1.9 branch reference
kensipe/dcos,mesosphere-mergebot/dcos,kensipe/dcos,dcos/dcos,GoelDeepak/dcos,mesosphere-mergebot/mergebot-test-dcos,mesosphere-mergebot/mergebot-test-dcos,dcos/dcos,GoelDeepak/dcos,mesosphere-mergebot/mergebot-test-dcos,mesosphere-mergebot/dcos,dcos/dcos,mesosphere-mergebot/mergebot-test-dcos,GoelDeepak/dcos,GoelDeepak/dcos,mesosphere-mergebot/dcos,dcos/dcos,mesosphere-mergebot/dcos,dcos/dcos,kensipe/dcos,kensipe/dcos