Remove references to heroku images in unit tests

Summary:
Changed the URLs in the unit tests, as well as in BooleanOG app
I used the URLs from posting the images to a group.
I'll change it if I get a response from the OG group.

Test Plan: Ran unit tests, BooleanOG

Reviewers: jacl

Reviewed By: jacl

CC: msdkexp@, platform-diffs@lists, bhiller

Differential Revision: https://phabricator.fb.com/D539775

Task ID: 1316084

src/tests/FBOpenGraphActionTests.m

@@ -73,7 +73,7 @@ - (void)testPostingSimpleOpenGraphAction {
     action.tags = [NSArray arrayWithObject:userObject];
 
     NSMutableDictionary *image = [NSDictionary dictionaryWithObjectsAndKeys:
-                                  @"http://fbsdkog.herokuapp.com/1.jpg", @"url",
+                                  @"https://sphotos-b.xx.fbcdn.net/hphotos-ash4/387972_10152013102225492_1756755651_n.jpg", @"url",
                                   nil];
     NSMutableArray *images = [NSArray arrayWithObject:image];
     action.image = images;
@@ -128,7 +128,7 @@ - (void)testPostingUserGeneratedImageInAction
     // the same goal (just checking that it was round-tripped).
     NSDictionary *image = [NSDictionary dictionaryWithObjectsAndKeys:
                            @"false", @"user_generated", 
-                           @"http://fbsdkog.herokuapp.com/1.jpg", @"url",
+                           @"https://sphotos-b.xx.fbcdn.net/hphotos-ash4/387972_10152013102225492_1756755651_n.jpg", @"url",
                            nil];
     NSMutableArray *images = [NSArray arrayWithObject:image];
     action.image = images;