Allow Javelin initBehavior to source alternative library behaviors

Summary: Ref T6467.  Opens up initBehavior for non-phabricator sourced behaviors.

Test Plan: Confirmed no impact on unset (default 'phabricator' source name) calls to initBehavior

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: aklapper, Korvin, epriestley

Maniphest Tasks: T6467

Differential Revision: https://secure.phabricator.com/D10780

Author: Christopher Johnson

src/applications/celerity/CelerityStaticResourceResponse.php

@@ -40,7 +40,7 @@ public function getMetadataBlock() {
   public function initBehavior(
     $behavior,
     array $config = array(),
-    $source_name = 'phabricator') {
+    $source_name) {
 
     $this->requireResource('javelin-behavior-'.$behavior, $source_name);
 

src/infrastructure/javelin/Javelin.php

@@ -2,9 +2,14 @@
 
 final class Javelin {
 
-  public static function initBehavior($behavior, array $config = array()) {
+  public static function initBehavior(
+    $behavior,
+    array $config = array(),
+    $source_name = 'phabricator') {
+
     $response = CelerityAPI::getStaticResourceResponse();
-    $response->initBehavior($behavior, $config);
+
+    $response->initBehavior($behavior, $config, $source_name);
   }
 
 }