make dns and route53 names consistent with /etc/hosts

[kbroughton]

This resolves #1277

• Installs cleanly on a fresh build of most recent master branch
• Upgrades cleanly from the most recent release
• Updates documentation relevant to the changes

[darKoram]

test this please

[langston-barrett]

@kbroughton Can you outline the acceptance criteria for testing this?

[kbroughton]

terraform apply
open route53 and view the server names. eg.
https://drive.google.com/file/d/0B5bhZOuD4S4FLTRxLTduRU91blE/view?usp=sharing

ssh into any host.
cat /etc/hosts

You should see that worker-001 is consistent in both locations. Previously, /etc/hosts was worker-01

[kbroughton]

btw, i noticed that some of the other providers, openstack, cisco-os already have this mechanism.
I'm guessing gce will have the same issue as aws. They even named the variable the same as me!

./terraform/openstack-modules.sample.tf: count_format = "%03d"
./terraform/openstack-modules.sample.tf: count_format = "%02d"
./testing/cisco-os.tf: count_format = "%03d"
./testing/cisco-os.tf: count_format = "%02d"

[langston-barrett]

Testing now.

[langston-barrett]

Works for me (AWS, obviously):

[centos@ip-10-1-1-199 ~]$ cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
10.1.3.64  lb1-control-03
10.1.3.34  lb1-worker-003
10.1.2.145  lb1-edge-02
10.1.1.65  lb1-edge-01
10.1.2.37  lb1-control-02
10.1.2.187  lb1-worker-002
10.1.1.199  lb1-control-01
10.1.1.169  lb1-worker-004
10.1.1.57  lb1-worker-001