CMS - make old getting started pages point to new ones

[katilp]

https://opendata-qa.cern.ch/docs/cms-getting-started-2010 -> https://opendata-qa.cern.ch/docs/cms-getting-started-aod
https://opendata-qa.cern.ch/docs/cms-getting-started-2011 -> https://opendata-qa.cern.ch/docs/cms-getting-started-aod
https://opendata-qa.cern.ch/docs/cms-getting-started-2015 -> https://opendata-qa.cern.ch/docs/cms-getting-started-miniaod

The HI specific pages remain as they are.