Don't allow custom periods for surveys

Author: Aaron-Detre

src/main/java/org/wise/portal/presentation/web/controllers/survey/SurveyAPIController.java

@@ -63,7 +63,7 @@ public void launchSurveyRun(@PathVariable String code, HttpServletResponse respo
       DuplicateUsernameException, ObjectNotFoundException, PeriodNotFoundException,
       StudentUserAlreadyAssociatedWithRunException, RunHasEndedException {
 
-    Projectcode projectCode = new Projectcode(code.replaceAll("\\+\\+", " "));
+    Projectcode projectCode = new Projectcode(code);
     Run run = runService.retrieveRunByRuncode(projectCode.getRuncode());
     if (run.getIsSurvey()) {
       handleSurveyLaunched(response, request, run, projectCode);