1) Add testshutdown
2) Clean ARP added in test cases.
3) Disable Find_LPM in test_route, as cleanup is required.
4) Port fix from mainline selectively w.r.t. init_done

Change-Id: I2fd34cd8fda189122593e28879247e4eb1a286a5
Merge "1) Add testshutdown 2) Clean ARP added in test cases. 3) Disable Find_LPM in test_route, as cleanup is required. 4) Port fix from mainline selectively w.r.t. init_done" into R1.06