add basic SMP DQM, based on Higgs framework
configurable dqm hist directory
move to HLT/SMP hist dir
monitor only single photon paths for now
updating for new SMP single photon paths
add new necessary parameter to config
add SMP HLT DQM to standard sequence
Merge pull request #6170 from olivito/smpdqm_v3

SMP HLT DQM, basic config and single photon paths