Add possibility to only create nagios_contactgroups and nagios_contacts locally

Signed-off-by: Christophe Vanlancker <christophe.vanlancker@inuits.eu>
Revert "Add possibility to only create nagios_contactgroups and nagios_contacts locally"
Doesn't make sense to export those, only makes sense on an icinga server

This reverts commit 559248104d6e7c8179d89eafd1d359cdae2005eb.
Do not export nagios_contact and nagios_contactgroup, makes only sense on a designated server locally

Signed-off-by: Christophe Vanlancker <christophe.vanlancker@inuits.eu>