New module vim_admin:
- check and load unattending ro_tasks
- check for vim updates and deletion in order to re-load it
- check vim_connectivity at creation edition
- Injection of ssh keys, retry if fails
- allow non load filesystem, because it is used only for cloud-init, but
it can be provided as text by LCM
- load sdn and wim targets
- sdn connectivity
- set network type 'data' when there are SRIOV or PT interfaces

Change-Id: I67147d1d500d60f0b2be1de214c97b1905168c8e
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>