Add the management of the user_visible
Add the management of the user_visible

This patch add the use of the user_visible
attribute in order to filter the result of
the *_get methods.
This patch is a part of the patches introduced
in order to filter technical resources.

Change-Id: Id865ab855137dfc5debed95840fe70e7b17c5d96

vpramo/contrail-generateDS,varunarya10/contrail-generateDS,vpramo/contrail-generateDS,JioCloud/contrail-generateDS,varunarya10/contrail-generateDS,varunarya10/contrail-generateDS,vpramo/contrail-generateDS,vpramo/contrail-generateDS,JioCloud/contrail-generateDS,varunarya10/contrail-generateDS,JioCloud/contrail-generateDS,JioCloud/contrail-generateDS,varunarya10/contrail-generateDS,vpramo/contrail-generateDS,JioCloud/contrail-generateDS