When using the "creates" option with the unarchive module, set changed
to False if the file already exists. This behavior is consistent with
other modules which use "creates", such as command and shell.

Needed to clear unwanted parameters from both args and complex args when
calling file module.

Fixes #10208

Submission includes support for
 - creating and registering services and checks
 - reading, writing and lookup for values in consul's kv store
 - creating and manipulating sessions for distributed locking on values in the kv
 - creating and manipulating ACLs for restricting access to the kv store
 - inventory support that reads the Consul catalog and group nodes according to
     - datacenters
     - exposed services
     - service availability
     - arbitrary groupings from the kv store

This submission makes extensive use of the python-consul library and this is required
as a dependency and can be installed from pip.

The tests were written to target a vagrant cluster which can be setup by following the
instructions here http://github.com/sgargan/consul-vagrant

Fix quoting of shell parameters used in remote_checksum and add integration test to detect the error

Fixes #682

without simplejson