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keystone and keystone_fernet container name variable is fixed in some places, but in the defaults directory, keystone and keystone_fernet container_name variable is variable. If the keystone and keystone_fernet container_name variable is changed during deployment, it will not be assigned to keystone and keystone_fernet, but a fixed 'keystone' and 'keystone_fernet' name. Change-Id: Ifc8ac69e6abc4586f0e4fd820b9022aea9f76396