CI: switch `bosh-ci`/`bosh` resource optionality #726

Job	Run time
unit_specs-director (mysql)	4m 8s
unit_specs-director (postgresql)	3m 1s
unit_specs (common:parallel)	47s
unit_specs (monitor:parallel)	56s
unit_specs (nats_sync:parallel)	54s
unit_specs (template:parallel)	52s
unit_specs (release)	51s
	11m 29s

Provide feedback