Update Ubuntu 12.04/14.04 LTS ini and cfg files.

Add ini files for Ubuntu 12.04/14.04 32/64 bit.
Update testcfg.huge/guest-os.cfg to add LTS releases and update md5sums.
Update 64-bit 12.04 server cfg to point at point release iso.
Add 32-bit 12.04 server cfg.

Signed-off-by: Chris J Arges <chris.j.arges@canonical.com>
Remove non-supported Ubuntu releases

Remove cfg, steps, presseds from unsupported releases.
In addition update guest-os.cfg.

Signed-off-by: Chris J Arges <chris.j.arges@canonical.com>
Merge pull request #1825 from arges/ubuntu

Changes to update Ubuntu cfg, ini, and preseed files.