Change bionic test from dev to gate for 18.05. Change-Id: I77b578bec509ddbf99b10067ba9509f501f34470
Notable issues resolved: openstack_upgrade_available() broken for swift https://bugs.launchpad.net/charm-swift-proxy/+bug/1743847 haproxy context doesn't consider bindings https://bugs.launchpad.net/charm-helpers/+bug/1735421 regression in haproxy check https://bugs.launchpad.net/charm-helpers/+bug/1743287 Change-Id: Ic9ca0350a238cb0c8f23f4335c7ea487a6662b20