log: fix bug, expand test coverage and slightly optimize (#847)

* log: fix bugs expand coverage and optimise

* log: fix linter issues

* log: fix linter issue and pack methods in same file

* log: drop defer

* logger: move global check inside getfields  and remove unused test function

* logger: Increase note thanks @gloriouscode

* logger: wrap error with writer type

* logger: change variable name

* logger: change variable names and remove validsublogger func as it doesn't add functionality over a standard map call

* logs: error when unsupported output is applied on setup calls

* logs: add glorious suggestion

* logger: add protection to reduce olympic gold medal races

* logger: fix linter issues

* log: glorious niterinos

gctscript/vm/vm_test.go

@@ -33,7 +33,7 @@ func TestMain(m *testing.M) {
 	c := log.GenDefaultSettings()
 	c.Enabled = convert.BoolPtr(false)
 	log.RWM.Lock()
-	log.GlobalLogConfig = &c
+	log.GlobalLogConfig = c
 	log.RWM.Unlock()
 	os.Exit(m.Run())
 }