FlakyTest - TestRedisAddrUpdater

[szuecs]

-- FAIL: TestRedisAddrUpdater (0.29s)
    --- FAIL: TestRedisAddrUpdater/kubernetes_dataclient (0.04s)
        redis_test.go:469: gauges: map[]
        redis_test.go:471: 
            	Error Trace:	/home/runner/work/skipper/skipper/redis_test.go:471
            	            				/home/runner/work/skipper/skipper/metrics/metricstest/metricsmock.go:61
            	            				/home/runner/work/skipper/skipper/redis_test.go:468
            	Error:      	Not equal: 
            	            	expected: 1
            	            	actual  : 0
            	Test:       	TestRedisAddrUpdater/kubernetes_dataclient
            	Messages:   	expected only the /test route
        redis_test.go:472: 
            	Error Trace:	/home/runner/work/skipper/skipper/redis_test.go:472
            	            				/home/runner/work/skipper/skipper/metrics/metricstest/metricsmock.go:61
            	            				/home/runner/work/skipper/skipper/redis_test.go:468
            	Error:      	Not equal: 
            	            	expected: 4
            	            	actual  : 0
            	Test:       	TestRedisAddrUpdater/kubernetes_dataclient
        redis_test.go:476: 
            	Error Trace:	/home/runner/work/skipper/skipper/redis_test.go:476
            	Error:      	Received unexpected error:
            	            	listen tcp 0.0.0.0:37239: bind: address already in use
            	Test:       	TestRedisAddrUpdater/kubernetes_dataclient
FAIL

[AlexanderYastrebov]

listen tcp 0.0.0.0:37239: bind: address already in use

This problem looks similar to #2718