Add converted version of block and object storage

This patch extends the previous 'Don't use merge.py for overcloud'
commit with the cinder-storage.yaml and swift-storage.yaml templates.

Requirements for this to deploy:

1. Block and object storage images have to be built
(overcloud-cinder-volume and overcloud-swift-storage)

2. The images have to be loaded by devtest_overcloud.sh
OVERCLOUD_CINDER_ID=$(load-image -d $TRIPLEO_ROOT/overcloud-cinder-volume.qcow2)
OVERCLOUD_SWIFT_ID=$(load-image -d $TRIPLEO_ROOT/overcloud-swift-storage.qcow2)

Change-Id: I45f9d9f051970a83e26c0fd924d7c98276958113
Merge "Add converted version of block and object storage"