Document that user must be in 'rest', 'provision' or 'admin' role for provision.pl to work

Hello,
like at the 1.12.9 opennms' version (http://issues.opennms.org/browse/NMS-7112), the provisioning script provision.pl just works if admin user credentials are used.

If another administrator user is used, the provision.pl doesn't work and generate and "403 Access is denied" error:

/opt/opennms/bin/provision.pl --username user --password pass node add "Router" 1.2.3.4 "ROUTERPC" 403 Access is denied at /opt/opennms/bin/provision.pl line 806.
main::post('Router/nodes', 'XML::Twig::Elt=HASH(0x191be98)') called at /opt/opennms/bin/provision.pl line 322
main::cmd_node('add', 'Router', 1.2.3.4, 'ROUTERPC') called at /opt/opennms/bin/provision.pl line 151

Thanks in advance

Best regards,
Pablo