In order to upgrade MOS from 7.0 to 9.1 the following steps should be
made:
* Upgrade Fuel Master node
* Upgrade Fuel Master node from 7.0 to 8.0
Record: docs/records/fuel_master_70_80.json
* Upgrade Fuel Master node from 8.0 to 9.0
Record: docs/records/fuel_master_80_90.json
* Apply 9.1 updates for 9.0 Fuel Master node
Record: docs/records/fuel_master_91_mu.json
* Upgrade MOS Cloud from 7.0 to 9.1
Record: docs/records/cloud_70_91_upgrade.json
Change-Id: I0157b48690d5f746423560ae764514461d1d0e45