Flaky GC on Azure integration test

[lynnro314]

The integration test of GC on Azure is flaky, and some times failing with timeout:

io.lakefs.clients.api.ApiException: java.net.SocketTimeoutException: timeout
	at io.lakefs.clients.api.ApiClient.execute(ApiClient.java:945)
	at io.lakefs.clients.api.RetentionApi.getGarbageCollectionRulesWithHttpInfo(RetentionApi.java:158)
	at io.lakefs.clients.api.RetentionApi.getGarbageCollectionRules(RetentionApi.java:136)
	at io.treeverse.clients.ApiClient.getGarbageCollectionRules(ApiClient.scala:106)
	at io.treeverse.clients.GarbageCollector$.main(GarbageCollector.scala:339)
	at io.treeverse.clients.GarbageCollector.main(GarbageCollector.scala)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.spark.deploy.JavaMainApplication.start(SparkApplication.scala:52)
	at org.apache.spark.deploy.SparkSubmit.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:955)
	at org.apache.spark.deploy.SparkSubmit.doRunMain$1(SparkSubmit.scala:180)
	at org.apache.spark.deploy.SparkSubmit.submit(SparkSubmit.scala:203)
	at org.apache.spark.deploy.SparkSubmit.doSubmit(SparkSubmit.scala:90)
	at org.apache.spark.deploy.SparkSubmit$$anon$2.doSubmit(SparkSubmit.scala:1043)
	at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:1052)
	at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)

Full log can be found here.