MM-9849 Added tracking of which settings are set through environment variables (#8586)

* MM-9849 Added tracking of which settings are set through environment variables

* Removed old version of viper

* Added forked version of viper

* Fixed unit tests

* Fixed more unit tests

* Removed copy from App.GetEnvironmentConfig

app/app.go

@@ -59,6 +59,7 @@ type App struct {
 	Saml             einterfaces.SamlInterface
 
 	config          atomic.Value
+	envConfig       map[string]interface{}
 	configFile      string
 	configListeners map[string]func(*model.Config, *model.Config)