Update the ec2.py inventory script to set ansible_host as well as ansible_ssh_host

[jbscare]

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

contrib/inventory/ec2.py

ANSIBLE VERSION

ansible 2.2.0 (inventory-ec2-py-ansible-host 118d7957b4) last updated 2016/08/16 21:17:54 (GMT -400)
  lib/ansible/modules/core:  not found - use git submodule update --init lib/ansible/modules/core
  lib/ansible/modules/extras:  not found - use git submodule update --init lib/ansible/modules/extras
  config file = 
  configured module search path = Default w/o overrides

SUMMARY

contrib/inventory/ec2.py sets ansible_ssh_host, but http://docs.ansible.com/ansible/intro_inventory.html#hosts-and-groups says

Ansible 2.0 has deprecated the "ssh" from ansible_ssh_user, ansible_ssh_host, and ansible_ssh_port to become ansible_user, ansible_host, and ansible_port.

Since the ansible_ssh_* variables aren't removed, just deprecated, this commit simply adds ansible_host to the variables set by ec2.py.

May address some (but probably not all) of #15286.

[nitzmahone]

@jlaska can you think of any issues this would cause on the Tower side?

[ansibot]

cc @willthames
click here for bot help

[willthames]

At this point in time I wonder if we should just replace ansible_ssh_host with ansible_host rather than add it alongside.

[jbscare]

@willthames : Sure, I've updated the PR to reflect that.

[s-hertel]

@jbscare I can't push commits to your branch to rebase this. Would you mind doing so? This looks good to me.

[jbscare]

Sure thing; done!