End 2 End tests speedup (#1180)

* Improving end 2 end tests, especially speed of execution and error, by implementing proper eventual asserts and timeouts.
* Add documentation for running individual tests
* Fixed String encoding in Patorni state check and error case
* Printing config as multi log line entity, makes it readable and grepable on startup
* Cosmetic changes to logs. Removed quotes from diff. Move all object diffs to text diff. Enabled padding for log level.
* Mount script with tools for easy logaccess and watching objects.
* Set proper update strategy for Postgres operator deployment.
* Move long running test to end. Move pooler test to new functions.
* Remove quote from valid K8s identifiers.

pkg/controller/postgresql.go

@@ -225,7 +225,7 @@ func (c *Controller) processEvent(event ClusterEvent) {
 	switch event.EventType {
 	case EventAdd:
 		if clusterFound {
-			lg.Debugf("cluster already exists")
+			lg.Debugf("Recieved add event for existing cluster")
 			return
 		}