Allocate cluster context per ANA group #479

Job	Run time
build-ceph	2m 1s
build	7m 39s
demo	4m 11s
discovery (container)	3m 44s
ha (sanity)	3m 45s
discovery (embedded)	3m 25s
pytest (cli)	2m 20s
ha (state_transitions)	3m 31s
pytest (state)	2m 32s
ha (state_transitions_both_gws)	4m 47s
pytest (multi_gateway)	2m 25s
pytest (server)	2m 36s
ha (state_transitions_loop)	13m 4s
pytest (grpc)	2m 0s
ha (state_transitions_rand_loop)	13m 0s
pytest (omap_lock)	3m 39s
pytest (old_omap)	1m 53s
pytest (log_files)	3m 41s
push-to-registry	1s
	1h 20m 14s

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