bugfix: ZENKO-1195 Add keys and del Redis commands

lib/metrics/RedisClient.js

@@ -44,6 +44,26 @@ class RedisClient {
         });
     }
 
+    /**
+     * Find keys matching with the given key pattern
+     * @param {String} key - The key pattern to match
+     * @param {Function} cb - The callback to call
+     * @return {undefined}
+     */
+    keys(key, cb) {
+        return this._client.keys(key, cb);
+    }
+
+    /**
+     * Delete the given key
+     * @param {String} key - The key to delete
+     * @param {Function} cb - The callback to call
+     * @return {undefined}
+     */
+    del(key, cb) {
+        return this._client.del(key, cb);
+    }
+
     /**
     * increment value of a key by 1 and set a ttl
     * @param {string} key - key holding the value