1034366 - Failure to export RPM repositories to ISO where the repository does not have a checksum manually set.
Merge pull request #397 from pulp/barnabycourt-1034366

1034366 - Failure to export RPM repositories to ISO where the repository...
Automatic commit of package [pulp-rpm] release [2.3.1-0.3.beta].
Merge branch 'pulp-2.3.1'