healthcheck: make sure chain backend has enough outbound peers [TEST 3] #15

Job	Run time
RPC and mobile compilation check	1m 38s
Sqlc check	33s
lint code	3m 5s
cross compilation	8m 28s
check commits	3m 8s
check pinned dependencies (google.golang.org/grpc v1.56.3)	5s
run macOS itest	59m 30s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	6s
sample configuration check	34s
run unit tests (btcd unit-cover)	16m 31s
run unit tests (unit tags="kvdb_etcd")	18m 8s
run ubuntu itests (btcd, backend=btcd)	41m 20s
run windows itest	43m 12s
run unit tests (unit tags="kvdb_postgres")	17m 28s
run ubuntu itests (bitcoind, backend=bitcoind)	52m 25s
run unit tests (unit tags="kvdb_sqlite")	15m 47s
run ubuntu itests (bitcoind-notxindex, backend="bitcoind notxindex")	52m 51s
run unit tests (btcd unit-race)	34m 31s
run ubuntu itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling")	52m 24s
run unit tests (unit-module)	45s
run ubuntu itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	1h 9m 23s
check release notes updated	5s
run ubuntu itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	1h 24m 8s
run ubuntu itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	54m 42s
run ubuntu itests (bitcoind-postgres-nativesql, backend=bitcoind dbbackend=postgres nativesql=true)	1h 24m 32s
run ubuntu itests (bitcoind-sqlite-nativesql, backend=bitcoind dbbackend=sqlite nativesql=true)	54m 42s
run ubuntu itests (neutrino, backend=neutrino)	50m 21s
	13h 40m 22s

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