Limit life of transport certificate to two-years
Limit life of transport certificate to two-years

Signed-off-by: Brendan Dixon <b419da1d4987146d59906f7bc17618db623e69cb@me.com>

andyliuliming/WALinuxAgent,hglkrijger/WALinuxAgent,Azure/WALinuxAgent,andyliuliming/WALinuxAgent,Azure/WALinuxAgent,hglkrijger/WALinuxAgent,rjschwei/WALinuxAgent,rjschwei/WALinuxAgent