[GiphyBridge] merge parameters context

Signed-off-by: Pierre Mazière <pierre.maziere@gmx.com>

bridges/GiphyBridge.php

@@ -10,16 +10,14 @@ class GiphyBridge extends BridgeAbstract{
 		$this->uri = "http://giphy.com/";
 		$this->description = "Bridge for giphy.com";
 
-        $this->parameters["By tag"] = array(
-          's'=>array('name'=>'search tag')
-        );
-
-        $this->parameters["Without tag"] = array(
+        $this->parameters[] = array(
+            's'=>array('name'=>'search tag'),
             'n'=>array(
                 'name'=>'max number of returned items',
                 'type'=>'number'
             )
         );
+
 	}
 
 	public function collectData(array $param){