Add support for mongodb container

Implements: blueprint kube-mongodb-container

Change-Id: If76f6c0be90c3025933795d262304a10bf1a880d
Adds support for Functional Nova-Network

Previously, the nova-network service was not fully functional.
This patch adds multi-interface support to the nova-network
container. The eth0 configuration is moved to a bridge (br100 per
nova defaults), and configures eth0 and eth1 as bridged
interfaces. eth0 is used for the nova-flat network and eth1 for
foating-ip's. This model is identical to typical bare-metal
nova-network deployments. The patch depends on the following patch
to kube-heat template that provides multiple interfaces per minion:

https://github.com/larsks/heat-kubernetes/pull/8

Rebased. Fixed merge conflict with k8s/pod/nova-compute-pod.yaml

Change-Id: Ieb59f397981a226555ce55ca621ef578b987e3c6
Implement zaqar container

The current implementation has been configured to use sqlite instead of
mongodb, since that container service is not yet available. Also, there
are no Icehouse RPMs available, so the Juno RPMs are fetched and
manually installed.

Implements: blueprint kube-zaqar-container

Change-Id: Ie875ab43ad3db92ae2712492ee151fbad0fec3cc
Merge "Implement zaqar container"
Merge "Adds support for Functional Nova-Network"