adding ruby193-rubygem-hpricot to el6 comp

SSIA Resolving:

```
--> Finished Dependency Resolution
Error: Package: ruby193-rubygem-haml-3.1.6-2.el6.noarch (katello)
           Requires: ruby193-rubygem(ruby_parser)
Error: Package: ruby193-rubygem-haml-3.1.6-2.el6.noarch (katello)
           Requires: ruby193-rubygem(hpricot)
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest
```