DO NOT MERGE : Update Security String to 2017-05-01 on lmp-dev am: e0b38c6277  -s ours am: 637f66925f am: 3481be638f  -s ours am: d4f9e95f7c am: 6962385144 am: 128b958afb am: 43cbfe0486  -s ours am: 0086be3401 am: 6af2006770 am: ea8a508c66  -s ours am: a981ae128e  -s ours
am: 5df927b12e  -s ours

Change-Id: I65772a09837c1a49b4139da50535f92c3419ee5b