Fix ON_NEXT_SUSPEND install mode (#1863)

Author: Igor Krasavin

ios/CodePush/CodePush.m

@@ -642,19 +642,25 @@ - (void)savePendingUpdate:(NSString *)packageHash
 // a resume-based update still pending installation.
 - (void)applicationWillEnterForeground
 {
-    if (_appSuspendTimer) {
-        [_appSuspendTimer invalidate];
-        _appSuspendTimer = nil;
-    }
     // Determine how long the app was in the background and ensure
     // that it meets the minimum duration amount of time.
     int durationInBackground = 0;
     if (_lastResignedDate) {
         durationInBackground = [[NSDate date] timeIntervalSinceDate:_lastResignedDate];
     }
 
-    if (durationInBackground >= _minimumBackgroundDuration) {
-        [self loadBundle];
+    if (_installMode == CodePushInstallModeOnNextSuspend) {
+        // We shouldn't use loadBundle in this case, because _appSuspendTimer will call loadBundleOnTick.
+        // We should cancel timer for _appSuspendTimer because otherwise, we would call loadBundle two times.
+        if (durationInBackground < _minimumBackgroundDuration) {
+            [_appSuspendTimer invalidate];
+            _appSuspendTimer = nil;
+        }
+    } else {
+        // For resume install mode.
+        if (durationInBackground >= _minimumBackgroundDuration) {
+           [self loadBundle];
+        }
     }
 }