Re-enable SPecs for GET case_contacts#leave (#6944)

tests: re-enable specs for get_case_contacts_leave

Author: yagosansz

spec/requests/case_contacts_spec.rb

@@ -162,15 +162,13 @@
     end
   end
 
-  xdescribe "GET /leave" do
+  describe "GET /leave" do
     subject(:request) do
-      get leave_case_contact_path
+      get leave_case_contacts_form_path
 
       response
     end
 
-    it { is_expected.to redirect_to(case_contacts_path) }
-
     it "redirects back to referer or fallback location" do
       request
       expect(response).to redirect_to(case_contacts_path)