Revert "Network Topology graph "twitches""

This reverts commit e5dae9b3
(and commit 1ca85550 which is
a follow-up styling fix).

The reverted commit itself is a nice improvement,
but considering the situation that Rocky release is approaching
at the end of August we revert this to recover the original
user-visible behavior. It would be nice if someone can revisit
the improvement in the next Stein release.

Change-Id: If324bd47a1b8c1b9579c1f38adeae31fdf583780
Closes-Bug: #1786628
Related-Bug: #1716834
(cherry picked from commit 9fbdc810)

openstack_dashboard/static/js/horizon.networktopologycommon.js

@@ -20,59 +20,6 @@ horizon.networktopologycommon = {
   }
 };
 
-function isEqual(data1, data2) {
-  var list1 = [], list2 = [];
-  function compare2Objects (data1, data2) {
-    var item;
-
-    if (isNaN(data1) && isNaN(data2) && typeof data1 === 'number' && typeof data2 === 'number') {
-      return true;
-    }
-
-    // Compare primitives and functions.
-    // Check if both arguments link to the same object.
-    // Especially useful on the step where we compare prototypes
-    if (data1 === data2) {
-      return true;
-    }
-    for (item in data1) {
-      if (data2.hasOwnProperty(item) !== data1.hasOwnProperty(item)) {
-        return false;
-      }
-      else if (typeof data2[item] !== typeof data1[item]) {
-        return false;
-      }
-
-      switch (typeof (data1[item])) {
-        case 'object':
-          if (!compare2Objects (data1[item], data2[item])) {
-                    return false;
-          }
-          break;
-
-        default:
-          if (data1[item] !== data2[item]) {
-            list1.push(data1[item]);
-            list2.push(data2[item]);
-          }
-          break;
-      }
-    }
-    return true;
-  }
-  if (!compare2Objects(data1, data2)) {
-    return false;
-  } else {
-    list1 = list1.sort();
-    list2 = list2.sort();
-    for (var i in list1) {
-      if (list2[i] != list1[i])
-        return false;
-    }
-  }
-  return true;
-}
-
 /**
  * Common data loader for network topology views
  */
@@ -83,7 +30,7 @@ horizon.networktopologyloader = {
   reload_duration: 10000,
   // timer controlling update intervals
   update_timer: null,
-  previous_data : {},
+
   init:function() {
     var self = this;
     if($('#networktopology').length === 0) {
@@ -101,11 +48,8 @@ horizon.networktopologyloader = {
       angular.element('#networktopology').data('networktopology') + '?' + angular.element.now(),
       function(data) {
         self.model = data;
-        if (!isEqual(data,self.previous_data)) {
-          angular.copy(data, self.previous_data);
-          $('#networktopology').trigger('change');
-        }
-        self.update_timer = setTimeout(function() {
+        $('#networktopology').trigger('change');
+        self.update_timer = setTimeout(function(){
           self.update();
         }, self.reload_duration);
       }
@@ -154,7 +98,7 @@ horizon.networktopologymessager = {
         setTimeout(function() {
           self.previous_message = null;
           self.delete_data = {};
-        }, self.reload_duration);
+        },self.reload_duration);
       }
     });
   },