low-priority framework issues

- https://its.cern.ch/jira/browse/O2-5231 Many processes crashing after throwing instance of 'boost::interprocess::lock_exception'
    - fixed and closed
    
 
- https://alice.its.cern.ch/jira/browse/O2-1900 : Merged workflow fails if outputs defined after being used as input
    - needs to be implemented by Giulio
 
 
- https://alice.its.cern.ch/jira/browse/O2-2213 : Cannot override options for individual processors in a workflow
    - requires development by Giulio first
        - implement something similar as for AOD metadata
        - serialized and separated workflow options to be compared with already given options
            - policies on how to proceed in case of options present several times to be discussed
 
 
- https://alice.its.cern.ch/jira/browse/O2-4166 ROOT Messages in the output of a workflow should not generally be interpreted as error
    - locally, FairLogger messages are communicated via WebSocket to the driver while all other output just goes through stderr
        - at P2, all goes via InfoLogger and is disrtibuted in two log files, `*_out.log` containing the FairLogger messages and `*_err.log` the stderr
       - log messages in ROOT all sent to `stderr` with `fprintf`
       - more iterations required with Giulio to identify the best way how to interpret them properly
       - DebugGUI
       - unknown logs (such as those from ROOT) are printed in dark red compared to neon red for FairLogger `ERROR` logs
           - different color (light gray, dark green) can mitigate the issue for the eyes, but not real solution since real `stderr` will be printed in the same color
           - few (`INFO`) logs without timestamp at the beginning of each task are printed in unknown color (dark red)
       - logs with true % sign now printed in color (fix by Giulio)
            
            
- working on DebugGUI improvements
   - https://its.cern.ch/jira/browse/O2-4196 Show in the debugGUI which input is condition / optional / timeframe
   - https://its.cern.ch/jira/browse/O2-2209 Show data origin/description in the info box when hovering a processor spec
    
 

PDP SRC

- should clean up known issues in QC shifter's documentation and filters for InfoLoggers
   - everything related to dropping incomlpete erors at EOR
   - oldestPossibleOutput errors
- SW installation on EPNs
   - limit number of SW versions to 8 (?) for disk space