Moved some functions to common package (#988)

* separate methods

* basic refactoring

* moved common code to util package to use it in gateway

* common check for argo rollouts

* made code compilable with latest changes on master

* Moved options to separate package and created CommandLineOptions instance that will be in sync with options values.

* reverted extra changes

* initialize CommandLineOptions with default options in module init

* wait for paused at annotation before checking deployment paused

* moved things around to fix things

* reverted unnecessary changes

* reverted rolling_upgrade changes

* reverted extra change

* additional checks in reloader

* refactor: ShouldReloadInternal method. It will be called by Reloader
ShouldReload has some additional resource/namespace filter checks which are not needed for Reloader

* added test cases

* moved config to sharable packae

* moved resource selector and label selctor methods

* fixed pipeline

* removed map.yaml

* removed vague comment

internal/pkg/cmd/reloader.go

@@ -133,13 +133,13 @@ func startReloader(cmd *cobra.Command, args []string) {
 	namespaceLabelSelector := ""
 
 	if isGlobal {
-		namespaceLabelSelector, err = util.GetNamespaceLabelSelector()
+		namespaceLabelSelector, err = common.GetNamespaceLabelSelector(options.NamespaceSelectors)
 		if err != nil {
 			logrus.Fatal(err)
 		}
 	}
 
-	resourceLabelSelector, err := util.GetResourceLabelSelector()
+	resourceLabelSelector, err := common.GetResourceLabelSelector(options.ResourceSelectors)
 	if err != nil {
 		logrus.Fatal(err)
 	}