Add the ability to bring up VLAN interfaces and include them in the
introspection report. A new configuration field is added -
``ipa-enable-vlan-interfaces``, which defines either the VLAN interface
to enable, the interface to use, or 'all' - which indicates all
interfaces. If the particular VLAN is not provided, IPA will
use the lldp info for the interface to determine which VLANs should
be enabled.
Change-Id: Icb4f66a02b298b4d165ebb58134cd31029e535cc
Story: 2008298
Task: 41183
6e3f28d720