Add database functionality

Change-Id: I22e914ef1ca6ec8217d131c073261b309d9f637e
Start controllers of KDS

Change-Id: Ie38f4b3982de576646c34a456b524e71b4647c70
New changes with db

Change-Id: I84fcdbe79762abcafd25d36d67252b2e6bec308e