Created AddBuilding Logic.

Signed-off-by: billal007 <billalkohistani@gmail.com>
Created AddLocker logic

Signed-off-by: billal007 <billalkohistani@gmail.com>
Create AddBuildingTest.java

Signed-off-by: billal007 <billalkohistani@gmail.com>
Created AddLockerTest.java

Signed-off-by: billal007 <billalkohistani@gmail.com>