bug 828 inject VCA key only when vnf/vdu-configuration:config-access:ssh-access:required is True

Send user to RO in the inject key command
Wait RO to get up sometime at staring before abandom

Change-Id: I073a3322281f213550b8cde99a53721d2d1d9f05
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>