devstack: default hash for swift
devstack: default hash for swift

SWIFT_HASH, random constant string required for swift by devstack
SWIFT_REPLICAS=1 disables replication

SUSE-Cloud/automation,gosipyan/automation,SUSE-Cloud/automation,gosipyan/automation,aspiers/automation,aspiers/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,gosipyan/automation,gosipyan/automation,aspiers/automation,aspiers/automation