Complete the mitm prevention on GCE.
Debugging to fix e2e testing issue
Add per-service env vars for *_SERVICE_HOST

As a replacement of a single SERVICE_HOST variable, offer a FOO_SERVICE_HOST
variable.  This will help ease the transition to ip-per-service, where there
is no longer a single service host.

# *** ERROR: *** Some files are missing the required boilerplate
# header from hooks/boilerplate.txt:
#   examples/guestbook/redis-slave/run.sh
#
# Your commit will be aborted unless you fix these.
#   COMMIT_BLOCKED_ON_BOILERPLATE
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
Fix the scripts.
Merge pull request #1429 from brendandburns/auth

Fix the scripts. (Again)
Merge pull request #1415 from thockin/svcenv

Add per-service env vars for *_SERVICE_HOST
Fix docker-links-style env vars for services

This includes 3 changes:

1) Use the Service.Protocol field, rather than hardcoding TCP.
2) Use Service.Port rather than ContainerPort - ContainerPort can be a string
   and has absolutely no meaning to consumers.
3) Beef up tests for these env vars.
Merge pull request #1431 from thockin/svcenv

Fix docker-links-style env vars for services