ni_provisioning: check for answers file for nilrt
ni_provisioning: check for answers file for nilrt

Check for answers file for distro nilrt like nilrt-nxg. This is a first step to
automate nilrt virtual image creation.

Signed-off-by: Ovidiu-Adrian Vancea <5c8543b42e0c702ca83e838bf20f72a81672f5ef@ni.com>

ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt