Remove last caller of credentials_changed?

Author: agrare

app/models/manageiq/providers/cloud_manager.rb

@@ -77,7 +77,7 @@ def open_browser
     end
 
     def stop_event_monitor_queue_on_credential_change
-      if event_monitor_class && !self.new_record? && self.credentials_changed?
+      if event_monitor_class && !new_record? && default_endpoint.changed.include_any?("hostname", "ipaddress")
         _log.info("EMS: [#{name}], Credentials have changed, stopping Event Monitor.  It will be restarted by the WorkerMonitor.")
         stop_event_monitor_queue
         network_manager.stop_event_monitor_queue if respond_to?(:network_manager) && network_manager

app/models/mixins/authentication_mixin.rb

@@ -183,8 +183,6 @@ def update_authentication(data, options = {})
 
     options.reverse_merge!(:save => true)
 
-    @orig_credentials ||= auth_user_pwd || "none"
-
     # Invoke before callback
     before_update_authentication if self.respond_to?(:before_update_authentication) && options[:save]
 
@@ -250,13 +248,6 @@ def update_authentication(data, options = {})
 
     # Invoke callback
     after_update_authentication if self.respond_to?(:after_update_authentication) && options[:save]
-    @orig_credentials = nil if options[:save]
-  end
-
-  def credentials_changed?
-    @orig_credentials ||= auth_user_pwd || "none"
-    new_credentials = auth_user_pwd || "none"
-    @orig_credentials != new_credentials
   end
 
   def authentication_type(type)