Change to dev build frequency

Hey all, As of today, we will no longer be building packages for upstream ceph.git branches each time a PR is merged. Instead, we will build each active (master, pacific, octopus, nautilus) branch twice daily ONLY if there were changes since the last build. https://github.com/ceph/ceph-build/pull/1743 makes this change. This job is now disabled: https://jenkins.ceph.com/view/all/job/ceph-dev-trigger/ This job will handle ceph.git dev builds: https://jenkins.ceph.com/job/ceph-dev-nightly/ The purpose of this change is to reduce the load on the CI builders. There is no change to dev branches in ceph-ci.git. -- David Galloway Senior Systems Administrator Ceph Engineering