clear javascript timer after access granted

lms/templates/proctor_release.html

@@ -73,6 +73,10 @@ procrel = (function(){
         do_pp_get('status', function(data){
 	    console.log(data);
 	    if (data.enabled) {
+                if (timeout != null) {
+                    console.log("Disabling timer");
+                    clearTimeout(timeout);
+                }
 	        alert ("Access Granted!");
 		location.reload();
 	    }
@@ -81,10 +85,12 @@ procrel = (function(){
 
     var check_count = 0;
 
+    var timeout = null;
+
     var periodic_check = function() {
         check_count = check_count + 1;
 	if (check_count < 100){			// >
-            setTimeout(periodic_check, 2000);
+            timeout = setTimeout(periodic_check, 2000);
 	}
 	check_access();
     }