Remove extra yum repos from hiera common example
Remove extra yum repos from hiera common example

We should keep minimal repositories setup in our example
hiera as other teams, thir parties, might be using that too.
Also, these repos are about rhel/centos 6 release, while our main goal
is to support 7th releses.

Change-Id: I69b3fa12aa1ef8f1123a13dfbf9697dbbb12c827
fuel-infra/puppet-manifests,fuel-infra/puppet-manifests,fuel-infra/puppet-manifests,fuel-infra/puppet-manifests