v1.11.2

Fixes to Whoops error handling

• Only use custom var dumper if Whoops 2+ is used
• Avoid throwing exceptions in log setup
  This avoids disrupting the callers code base due to incorrect
  configuration or if the channel simply is not defined.
• Channels site and base are logged to var/log for ezp apps
• Catch exceptions in bootstrapping of Whoops error handler