1.11.0 - falls are not terrible

Added

• Step cleanup_instance_files to clean up data of stopped instance
• Add availability to set environment variables for instance service
• Add instances_from_same_machine variable in preparation
• Add check_new_topology step to compare inventory and real cluster topology
• Availability to disable instances via disabled flag
• Add backup, backup_start, backup_stop and restore steps to back up and restore instances

Changed

• Hosts uniqueness considers ansible_port, not only ansible_host

Fixed

• Long facts caching when playbook has two or more role imports
• Now select control instance task ignores bad instances from membership
• Fix instance joining when a leader is not first