Removed deprecated Class['cloudera::repo'].
Renamed yumserver and yumpath parameters to repo*.

The class parameters and variables `yumserver` and `yumpath` have been
renamed to `reposerver` and `repopath` respectively.  This makes the
name more generic as it applies to APT and Zypprepo as well as YUM
package repositories.
Merge branch 'feature/rename_repo_params' into develop