fixing hang in input source on termination via SIGINT (part1)
SIGINT shutdown fixes (part 2)
remove logs which are filling up log files when no input
* removed debugging from json_value.cpp
* added file size to the output json file
* cleanup and better formatting of logs
* more fixes for graceful shutdown when there is signal interruption
no FU-local lock file created in BU emulator mode
rate of some logs reduced
converting some logs to LogDebug
Merge branch 'CMSSW_7_1_X' into bugfixes
Merge pull request #3883 from smorovic/bugfixes

Bugfixes and log cleanup in EventFilter/Utilities