Docker: don't send wrong parameters to client.start()

As part of being updated for the 1.10 API, a couple of parameters were passed to the docker.client.start() command that it doesn't accept. This caused the module to error out if it tried to start any Docker containers. This removes those parameters so the module works again.
Support hosts without private ip without errors

Not all Linode hosts have a private ip. This fixes an actual error that was happening because the generated list of private ips is empty when there isn't one.
Added Abiquo inventory plugin
apt_key lists all keys in uppercase

allow for a little user error
Add Docker inventory plugin
apt_key: fix key lookup for 64 bit key ids

Fixes #7018 by extending `all_keys` to work with either short or long keys.

Also removes the ununsed method `key_present`.
docker: send 1.10 params if docker-py is new enough version
docker: exclude 'entrypoint' from comparing 'command' param with containers

The JSON the Docker API returns includes the container's ENTRYPOINT value (if it has one) with the 'Command' value. So instead of checking if `container['Command'] == module.params['command']`, we just check that `container['Command'].endswith(module.params['command'])` so the entrypoint won't affect a container being properly classified as matching the module params or not.

Also I refactored a super-long `if` statement into some temporary variables - I did it to help me figure out what was going wrong, and then it makes the code more readable so I kept it.
Large cleanups. Reintegrating all modules together for a guest
ec2_eip integration tests.
More config checks and clean up for vm_config settings
Creation complete
Started reconfigured
Ignore Vagrant
Hide YAML content on syntax errors when a vault password is specified

Fixes #6601
Core complete
Fix handling of non-JSON lines in responses

Garbage lines with ' = ' in them were causing parsing errors,
where key=val lines should not have spaces around the equals.

Fixes #6962
Ready for pull request
Merge pull request #6991 from joshuaconner/bugfix_dont_send_wrong_params_to_dockerclient_start

Docker: don't send wrong parameters to client.start()
Merge pull request #6992 from joefiorini/patch-1

Support hosts without private ip without errors