MUMNOTPLT-40 : Add in user based notifications

* Created `NOTIFICATION_USER` table
* Added in query in the repository to get the notifications based off of new table
* Added in service method to get them when getting list of notifications

Verified with localhost

![image](https://cloud.githubusercontent.com/assets/3534544/3648052/9daf62cc-1105-11e4-842b-db2be6ab35a2.png)