[v32] python3 compatibility

BEGINRELEASENOTES

*Core
NEW: iLCDirac is now python3 compatible.

*Framework
CHANGE: Removed MonitorAgents is now part of DIRAC as ComponentSupervisionAgent

ENDRELEASENOTES

• make pylint pass with the changes
• make pylint -py3 pass
• make all the tests pass
• add possibility to install with pip install ILCDIRAC
• add CI for python3
• adapt ILCDIRAC scripts for pip install
• publish ILCDIRAC to pypi