Created command line interface 'fuel_upgrade'
for master node upgrading

This script will be delivired with update file.

Responsibility of the script:
* run backup
* run upgrade
* run rollback in case of errors
* check that update deployed correctly

Related to blueprint fuel-upgrade

Change-Id: Id4daf45a32d5f3fd3e2efb4c5767d85d9c03c58c
Merge "Created command line interface 'fuel_upgrade' for master node upgrading"