Fix Bug 2380:Static Inactive session timeout for a user

	- Backend will sharing timeout data through api. will store it
	  in sessionstorage & using it in NGUI
	- To avoid runtime issues, if did'nt get data from api added
	  constant value as 1200

Change-Id: Id00fced3ce26d9f9364d58a0d01ecef891f91262
Signed-off-by: SANDHYA.JS <sandhya.j@tataelxsi.co.in>