Add waitForDiagnostics in tactic tests

Author: jneira

test/functional/Tactic.hs

@@ -133,6 +133,7 @@ goldenTest input line col tc occ =
   testCase (input <> " (golden)") $ do
     runSession hlsCommand fullCaps tacticPath $ do
       doc <- openDoc input "haskell"
+      _ <- waitForDiagnostics
       actions <- getCodeActions doc $ pointRange line col
       Just (CACodeAction (CodeAction {_command = Just c}))
         <- pure $ find ((== Just (tacticTitle tc occ)) . codeActionTitle) actions