Emdqm standalone

Migration from getByLabel to getByToken for HLTriggerOffline/Egamma package.

Code for isolation histograms could not easily be migrated and is now commented out. The histograms there were actually never filled before anyway because the data necessary was not stored in the HLTDEBUG tier.
In central DQM the iso plots are also switched off in the configuration.

EmDQMFeeder was erased because its functionality is now included in EmDQM.
Some old python config files for obsolete triggers were erased as well.

I have Tested the changes with 7_0_0_pre8 relval samples (ZEE, WE, PhotonJetsPt10, H130GGgluonfusion) and observed no changes wrt. the previous version.