1103232 - Document importer settings.

https://bugzilla.redhat.com/show_bug.cgi?id=1103232
Troubleshooting info on RPMs with non UTF-8 fields
Added proper spacing and added proper underline
Removed double space
Updated wording of troubleshooting for non UTF-8 rpms
Merge pull request #573 from dkliban/1131512

1131512 - Troubleshooting info on RPMs with non UTF-8 fields
Merge branch '2.4-testing' into 2.4-release
Automatic commit of package [pulp-rpm] release [2.4.2-1].
Merge branch '1103232' into 2.4-release