Fixing pulp test failure

Fixing the following test failure:

  1) Error:
test_manifest_delete(GlueCandlepinProviderTestDelete):
NoMethodError: undefined method `extensions' for nil:NilClass
    /home/dadavis/Projects/katello/test/glue/candlepin/provider_test.rb:114:in `test_manifest_delete'
Merge pull request #2757 from daviddavis/temp/20130813170425

Fixing pulp test failure