Develop dqm 710pre2 v03

Calls of functions of the DQMStore should have been removed by now to run safely in threaded DQM. Only exception is a DQMStore ->save() call if we run our code privately (switched off per default).

The only place where we still use DQMStore functionality is during the harvesting step, so hopefully all problematic issues have been solved.

We work with release CMSSW_7_1_0_pre2.