This commit removes the following variables:
* ssl_protocol and ssl_cipher_suite variables. These variables are
already set to these values by default. Therefore there is no need
to set them here.
* *_ceilometer_enabled variables. OSA Newton now enables ceilometer
based on wheater the hosts are allocated in the inventory. Since
we don't carry a ceilometer env.d file, these variables will
automatically get set to False.
* Removed unnecessary comment regarding apt_pinned_packages
* Removed apply_security_hardening variable. There is no need to set
this variable to true as that's already it's default value.
* Removed the "cinder_service_backup_program_enabled: true" setting
from deploy.sh. This variable is now automatically set to true
when there are swift hosts present
* Renamed the cinder_rpc_thread_pool_size variable to the proper