Other changes:
- Adjusted packer configs to use MSVSphere 9 as a base platform
for building images.
- Added special notes on building images on Fedora.
- Added instructions on debugging image build process.
- Added vnc_port_min and vnc_port_max packer variables to make
build on remote machines easier.
- Updated Generic Cloud kickstart file to use public mirror
instead of the internal one.
- Updated Generic Cloud kickstart file to use "os" instead of
"kickstart" repos in order to install all present updates.