fixing the TravisCI build with InfluxDB new features:

- dbs is changed to db in the latest InfluxDB when listing dbs
 - username is changed to name in the latest InfluxDB when creating
   user
 - PHPUnit_Framework_TestCase instead of phpunit_framework_testcase
 - Grouping by anything but time does not return time anymore

lib/InfluxPHP/Client.php

@@ -68,7 +68,7 @@ class Client extends BaseHTTP
         $self = $this;
         return array_map(function($obj) use($self) {
             return new DB($self, $obj['name']);
-        }, $this->get('dbs'));
+        }, $this->get('db'));
     }
 
     public function getDatabase($name)

lib/InfluxPHP/DB.php

@@ -85,8 +85,8 @@ class DB extends BaseHTTP
         return new Cursor($this->get('series', ['q' => $sql, 'time_precision' => $this->timePrecision]));
     }
 
-    public function createUser($username, $password)
+    public function createUser($name, $password)
     {
-        return $this->post('users', compact('username', 'password'));
+        return $this->post('users', compact('name', 'password'));
     }
 }