Complete the mitm prevention on GCE.
Debugging to fix e2e testing issue
Merge pull request #1418 from brendandburns/auth

Complete the mitm prevention on GCE.
Refactory a little bit.
Fix the scripts.
Merge pull request #1426 from brendandburns/auth

Fix the scripts.
Merge pull request #1424 from dchen1107/cleanup

Fix e2e testing issue