Set the default VHD file format to the fixed-size image for the 10.2-RELEASE, as the issue preventing the dynamic-size image from booting is not yet resolved.
Set the default VHD file format to the fixed-size image for the
10.2-RELEASE, as the issue preventing the dynamic-size image from
booting is not yet resolved.

This is a direct commit to releng/10.2.

Approved by:	re (kib)
Sponsored by:	The FreeBSD Foundation

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase