cockroachdb: remove --extra-1.0-compatibility flag
cockroachdb: remove --extra-1.0-compatibility flag

In DC/OS we start out with CockroachDB 1.1 so this one
does not apply.

mesosphere-mergebot/dcos,kensipe/dcos,GoelDeepak/dcos,dcos/dcos,mesosphere-mergebot/mergebot-test-dcos,mesosphere-mergebot/dcos,mesosphere-mergebot/mergebot-test-dcos,GoelDeepak/dcos,GoelDeepak/dcos,dcos/dcos,mesosphere-mergebot/dcos,mesosphere-mergebot/dcos,kensipe/dcos,kensipe/dcos,mesosphere-mergebot/mergebot-test-dcos,dcos/dcos,GoelDeepak/dcos,dcos/dcos,dcos/dcos,kensipe/dcos,mesosphere-mergebot/mergebot-test-dcos