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/util/config/config.go

@@ -199,7 +199,7 @@ type Config struct {
 
 // MustMarshal marshals the config or panics
 func (c Config) MustMarshal() string {
-	b, err := json.MarshalIndent(c, "", "\t")
+	b, err := json.MarshalIndent(c, "", "   ")
 	if err != nil {
 		panic(err)
 	}