The implementation is inspired by pkg/remote module, and evolves
it to be built on top of document bundles as well as makes it
more command line oriented by adding RunOperation method.
Change-Id: If95a007986eb61c977c1ddbe5a94cfbeefeac225
Relates-To: #397
Relates-To: #362
Relates-To: #359
This interface will be used by executors and other
commands to interact with remote hosts.
It is split into generic inventory and BaremetalInventory to
keep open door for cloud providers. In the future, if we
decide to that we need, for example list VMs in google, azure,
openstack or any other clouds, we would extend inventory interface
with approprate more sepcific inventory such as OpenstackInventory
etc...
Relates-To: #297
Change-Id: Ie19ed6047390e09a658c1e943b5e83d88e9668bf