spec: fix fragile collaboration spec for chrome

Test Plan:
- Tests pass
- Code review

Change-Id: I6df6e8815d35d83dd940a18f71761449dddfb7e7
Reviewed-on: https://gerrit.instructure.com/78870
Tested-by: Jenkins
Reviewed-by: Pedro Fajardo <pfajardo@instructure.com>
Product-Review: Matt Fairbourn <mfairbourn@instructure.com>
QA-Review: Matt Fairbourn <mfairbourn@instructure.com>

spec/selenium/groups_pages_student_spec.rb

@@ -318,12 +318,14 @@ describe "groups" do
         replace_content(find('#collaboration_description'), "c1 description")
         fj('.available-users li:contains("1, Test Student") .icon-user').click
         fj('.btn:contains("Start Collaborating")').click
-        wait_for_ajaximations
-        # Reload page and new collaboration will be displayed on main window
-        refresh_page
+        keep_trying_until do
+          # verifies collaboration will be displayed on main window
+          tab1 = driver.window_handles.first
+          driver.switch_to.window(tab1)
           expect(fj('.collaboration .title:contains("c1")')).to be_present
           expect(fj('.collaboration .description:contains("c1 description")')).to be_present
         end
+      end
 
       it 'can invite people within your group', priority: "1", test_id: 273642 do
         students_in_group = @students