Fix bug 1560 to ensure that OSM is healthy after installation

This change updates health-check to determine more accurately when the system
is ready. All the deployments and statefulsets must have all its pods running
and stable during some time.

Change-Id: Ibe7ab30415ce81fd95caa0fdd66710746de7605b
Signed-off-by: ramonsalguer <javier.ramon@telefonica.com>
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>