Katello/katello — pull request #3969 by jlsherrill (2014-04-10 18:26:14+00:00)
Title: fixes #5142 - fixing error on repo create with empty string

pulp does not treet empty string for feed urls the same as
nil. As a result repo creation would fail. This fixes the issue by doing 2 things:

a) convert empty string to nil at repo creation time
b) explicitly do not accept empty string in the url validator