Flaky test: org.apache.zookeeper.server.util.RequestPathMetricsCollectorTest.testCollectStats

Test org.apache.zookeeper.server.util.RequestPathMetricsCollectorTest.testCollectStats consistently pass on local dev environment but frequently failing on Jenkins pre-commit build.

For now disable the test to unblock a couple of pull request acquiring a green build, before it's completely addressed.

Error for reference:

Error Message
expected:<845466> but was:<1100001>
Stacktrace
java.lang.AssertionError: expected:<845466> but was:<1100001>
	at org.apache.zookeeper.server.util.RequestPathMetricsCollectorTest.testCollectStats(RequestPathMetricsCollectorTest.java:248)