/**
* @api {post} /employee/:id/supervisor 17.Save Supervisor Details
* @apiName saveEmployeeSupervisor
* @apiGroup Employee
* @apiVersion 0.1.0
* @apiUse AdminDescription
*
* @apiParam {Number}  id Employee id.
*
* @apiParam {Number} supervisorId Supervisor id.
* @apiParam {String} reportingMethod Reporting method to the supervisor.
* @apiSuccess {Object} Data Success response.
*
* @apiSuccessExample Success-Response:
*     HTTP/1.1 200 OK
*
* @apiSuccessExample Success-Response:
*     HTTP/1.1 200 OK
*
*      {
*        "success": "Successfully Saved"
*      }
*
* @apiError Bad-Response Saving Failed.
*
* @apiErrorExample Error-Response:
*     HTTP/1.1 400 Bad Request
*     {
*       "error": ["Saving Failed"]
*     }
*/