Installer adapters

Installer adapters

This tool might be used by any project in OPNFV
to retrieve information about the deployed
OpenStack nodes.
It is python based and using paramiko.

It can:
  - get info about deployment
  - get the info about the nodes (ip, mac, ...)
  - stablish ssh connection even with ProxyCommand option
  - run remote commands
  - scp to/from nodes (i.e. fetch credentials from controller)

Added FuelAdapter as an example.

JIRA: RELENG-149
JIRA: RELENG-150

Change-Id: I49d8be96d754e0950e337aa2f88172341446fdd4
Signed-off-by: jose.lausuch <jose.lausuch@ericsson.com>