initial changes for merging DQM histograms
DQM histogram merging working
indentation fix
ignore DQM stream in case fastHadd command test fails
Merge branch 'master' into dqmHistograms
*modified mount parameter for output disk
*check if root dir before attempting delete
fixed test logprint central index query
avoid race with process watchdog
*restart on >0 exit code (it seems to be casted to unsigned char, e.g. _exit(-1) --> code 255 in python)
*introducing global lock to prevent simultaneous access
*preparation for central ES changes
cleaner error reporting and exit on inability to mount ramdisk or output
Merge branch 'dqmHistograms' into m+h

Conflicts:
	python/aUtils.py
fastHadd fix
histogram merging test file
*improved DQM histogram stream handling (removing files if lumisection was empty)
*zero events json file is copied to output for streamDQM and streamDQMHistograms to cover cases where no events were processed (this is needed for current lumi checks by DQM)
caveat: CMSSW processes might not see each lumisection, but this should be a very rare case
minidaq hosts will use runindex_minidaq central index name
different runindex also for dqm machines (currently hardcoded)
BoLS files created also for empty lumi for two DQM streams
*make dir at proper place
*ending DQM merging thread properly
bump release version