[zendframework/zendframework#1713] Fix failing tests in Compress filter

- Due to addition of getOptions() to AbstractFilter, Compress filter no longer
  was proxying to the underlying adapter. Added an override getOptions() method
  that now explicitly proxies to the adapter.

src/Compress.php

@@ -175,6 +175,18 @@ public function setAdapterOptions(array $options)
         return $this;
     }
 
+    /**
+     * Get individual or all options from underlying adapter
+     * 
+     * @param  null|string $option 
+     * @return mixed
+     */
+    public function getOptions($option = null)
+    {
+        $adapter = $this->getAdapter();
+        return $adapter->getOptions($option);
+    }
+
     /**
      * Calls adapter methods
      *