Cleanup EideticRequestMonitor
Merge pull request #3056 from davidegrohmann/2.1-cleanup-eidetic-req-monitor

[2.1] Cleanup EideticRequestMonitor
Merge branch '2.1-maint' into 2.2-merge-2.1

Conflicts:
	enterprise/ha/src/test/java/org/neo4j/ha/monitoring/EideticRequestMonitor.java
	enterprise/ha/src/test/java/org/neo4j/ha/monitoring/RemoteRequestMonitoringIT.java
Merge pull request #3107 from lutovich/2.2-merge-2.1

2.2 <-[:merge]- 2.1