MDL-39207 badges: don't use curl version depedent constant

It seems that CURLOPT_CONNECTTIMEOUT_MS is depdendent on the version
of curl compiled against. We don't need milliseconds here anyway, so
switch to the seconds value.

badges/lib/backpacklib.php

@@ -64,7 +64,7 @@ public function curl_request($action, $collection = null) {
             'RETURNTRANSFER' => true,
             'FORBID_REUSE' => true,
             'HEADER' => 0,
-            'CONNECTTIMEOUT_MS' => 3000,
+            'CONNECTTIMEOUT' => 3,
         );
 
         if ($action == 'user') {

lib/badgeslib.php

@@ -1279,7 +1279,7 @@ function badges_check_backpack_accessibility() {
         'FRESH_CONNECT' => true,
         'RETURNTRANSFER' => true,
         'HEADER' => 0,
-        'CONNECTTIMEOUT_MS' => 2000,
+        'CONNECTTIMEOUT' => 2,
     );
     $location = 'http://backpack.openbadges.org/baker';
     $out = $curl->get($location, array('assertion' => $fakeassertion->out(false)), $options);