Tweaking the locking timings to see if it decreases starvation locks.

Change-Id: If62aa28d5652dc707a1eebee22a25353bcb76ae9
Signed-off-by: sousaedu <eduardo.sousa@canonical.com>

locking of ro_tasks for HA enhancements:
- lock time is configurable by ro.cfg or ENV
(OSMRO_SERVER_TASK_LOCKED_TIME)
- lock time is reduced to 10min by default
- lock is renewed when needed by a new asyncio task at vim_admin

Change-Id: Icae02803e57713aca2f028884142fa152ee3d032
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>

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>

Generates the package python3-osm-ng-ro for a new RO server
One or other server is controlled by env OSMRO_NG

Change-Id: I1b563006eeb008d05b37d5116f9741dc4f12a9ba
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>