Rebuilt to rename pyrpkg to python2-rpkg
Major changes are
* pyrpkg is renamed to python2-rpkg. Meanwhile, the CLI package named
rpkg is not a separate RPM anymore, it is moved to
/usr/share/rpkg/examples/cli.
* Buildroot is remove since EPEL5 is not a target supported
distribution.
* Remove unused dependent packages curl and openssh-clients.
* Change Group to Development/Libraries as rpkg is a library for
implementing CLI to interact with dist-git and Koji.
Resolves: rhbz#1400592