Fixing rest api dispatching for plugins with camelcase names

- plugin camelcase names are supported now
- fix for bug when a requests like
    GET /plugin-erik/hello/world
    GET /plugin-nonExistsPlugin/hello/world
  was resolving and dispatching the same resource

workflow/engine/classes/class.pluginRegistry.php

@@ -1408,7 +1408,7 @@ class PMPluginRegistry
 
                 // Ensure that is registering only existent classes.
                 if (class_exists($ns)) {
-                    $this->_restServices[strtolower($sNamespace)][] = array(
+                    $this->_restServices[$sNamespace][] = array(
                         "filepath" => $classFile,
                         "namespace" => $ns
                     );