update authors file for work done on Centos branch
update authors file for work done on Centos branch

krakatoa/garethr-riemann,envato/puppet-riemann,udacity/garethr-riemann,krakatoa/garethr-riemann,envato/puppet-riemann,udacity/garethr-riemann,envato/puppet-riemann,udacity/garethr-riemann,krakatoa/garethr-riemann,garethr/garethr-riemann