Support sha1 for CentOS/RHEL 5 repos

[g3kk0]

If Pakrat is run from a RHEL 6 node it uses sha256 checksum when creating repository metadata. This breaks any RHEL 5 repositories as they only support sha1. It would be really nice to have the ability to specify the checksum type Pakrat uses to create the repository metadata.

[ryanuber]

@g3kk0 this should be do-able. I'll draft some code for this later this week. Thanks for the suggestion!

[jrwesolo]

@ryanuber Have you had a chance to check this out yet?

[vamegh]

Hi @jrwesolo, check out my fork here: https://github.com/vamegh/pakrat it works with centos 5 and centos7.

[jrwesolo]

Thank you @vamegh!