QA:Testcase Anaconda rescue mode

Description

This test boots any available installation method (CDROM, DVD, or network) and requests a "rescue" install. For details on booting into rescue mode please refer to the Install Guide .

How to test

1. Boot the installer using any available means (CDROM, DVD, http, ftp, or nfs) with the rescue command-line parameter
2. If doing a network installation, specify the remote installation source for grabbing stage2 anaconda (e.g. nfs, http, or ftp)
3. Instruct anaconda to scan your disks for existing installations
4. Select "OK" to chroot into /mnt/sysimage for your existing installation

Expected Results

1. Anaconda should prompt for language, keymap, and installation media (e.g. nfs, http, ftp, local cdrom, hard drive)
2. Anaconda should find stage2 images and proceed to disk scan prompt
3. Scanning your disk for existing installations must will not result in a failure
4. Selecting OK will present you with a shell where you are able to see the previous installation mounted under /mnt/sysimage.
5. Additionally, you may be able to execute chroot /mnt/sysimage /bin/bash without error