discovery: fix num of allowed listeners #1781

Job	Run time
build	8m 46s
build	8m 46s
build-ceph	2m 16s
build-ceph	2m 16s
pytest (cli)	2m 10s
pytest (cli)	2m 10s
ha (sanity)	3m 52s
ha (sanity)	3m 52s
pytest (cli_change_lb)	2m 13s
pytest (cli_change_lb)	2m 13s
discovery (container)	3m 57s
discovery (container)	3m 57s
ha (state_transitions)	3m 27s
ha (state_transitions)	3m 27s
pytest (state)	2m 11s
pytest (state)	2m 9s
discovery (embedded)	3m 58s
discovery (embedded)	3m 58s
demo	3m 46s
demo	3m 46s
ha (state_transitions_both_gws)	4m 51s
ha (state_transitions_both_gws)	4m 51s
pytest (multi_gateway)	2m 14s
pytest (multi_gateway)	2m 14s
ha (state_transitions_loop)	12m 15s
ha (state_transitions_loop)	12m 15s
pytest (server)	2m 41s
pytest (server)	2m 41s
ha (state_transitions_rand_loop)	11m 41s
ha (state_transitions_rand_loop)	11m 41s
pytest (grpc)	5m 41s
pytest (grpc)	5m 41s
pytest (omap_lock)	5m 19s
pytest (omap_lock)	5m 19s
ha (late_registration)	4m 14s
ha (late_registration)	4m 14s
pytest (old_omap)	2m 1s
pytest (old_omap)	2m 1s
ha (late_registration_loop)	15m 16s
ha (late_registration_loop)	15m 16s
pytest (log_files)	3m 55s
pytest (log_files)	3m 55s
ha (4gws)	5m 51s
ha (4gws)	5m 51s
pytest (nsid)	3m 23s
pytest (nsid)	3m 23s
ha (4gws_loop)	7m 10s
ha (4gws_loop)	7m 10s
ha (namespaces)	9m 44s
ha (namespaces)	9m 44s
ha (namespaces_loop)	16m 47s
ha (namespaces_loop)	16m 47s
push-to-registry	0s
push-to-registry	0s
	4h 59m 16s

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