QA:Testcase install repository Mirrorlist default

Description

This install verifies the validity of the repository auto-selected by the anaconda during installation with netinst.iso.

How to test

1. Boot system from netinst.iso or pxeboot images
2. Leave 'Installation Source' spoke at default settings, do not enter this spoke
3. Partition the system in a normal way and complete the installation
4. Remove the ISO before rebooting into installed system when instructed by installer

Expected Results

1. System boots into installer properly
2. Installer defaults to auto-selecting a mirror with no user interaction required
3. Anaconda functions properly and successfully installs required packages
4. Package errors should not occur
5. System boots successfully