When the OSD pool size is unset it defaults to 3, while we only
have a single OSD in CI so the pools are created but not writable.
We did set the default pool size to 1 in the non-containerized
scenarios but apparently missed it in the containerized version.
Change-Id: I1ac1fe5c2effd72a2385ab43d27abafba5c45d4d
Closes-Bug: #
1710773
CephMonKey: 'AQC+Ox1VmEr3BxAALZejqeHj50Nj6wJDvs96OQ=='
CephAdminKey: 'AQDLOh1VgEp6FRAAFzT7Zw+Y9V6JJExQAsRnRQ=='
CephClientKey: 'AQC+vYNXgDAgAhAAc8UoYt+OTz5uhV7ItLdwUw=='
+ CephPoolDefaultSize: 1
NovaEnableRbdBackend: true
CinderEnableRbdBackend: true
CinderBackupBackend: ceph
CephMonKey: 'AQC+Ox1VmEr3BxAALZejqeHj50Nj6wJDvs96OQ=='
CephAdminKey: 'AQDLOh1VgEp6FRAAFzT7Zw+Y9V6JJExQAsRnRQ=='
CephClientKey: 'AQC+vYNXgDAgAhAAc8UoYt+OTz5uhV7ItLdwUw=='
+ CephPoolDefaultSize: 1
SwiftCeilometerPipelineEnabled: false
NeutronServicePlugins: 'router, networking_bgpvpn.neutron.services.plugin.BGPVPNPlugin'
BgpvpnServiceProvider: 'BGPVPN:Dummy:networking_bgpvpn.neutron.services.service_drivers.driver_api.BGPVPNDriver:default'