* This adds support the CommandRunner to handle executing commands on
the remote device.
* It also changes the waitfor argument to wait_for to remain compatable
with other modules and adds an alias for waitfor.
* Restricts commands to show commands only when check mode is specified.
* add version_added to wait_for doc string
This change updates the returns values from eos_command to be consistent
with network modules. It now returns stdout, stdout_lines and failed_conditionals
This adds a new module eos_command to network/eos. The eos_command module
is used for sending arbitrary commands to Arista EOS devices. It includes
arguments that allow the module to wait for specific values before the
module returns control to the playbook or fails
