errorlib: hiding bibcatalog info in exception body

* Does not disclose bibcatalog_password stored in the user_info
  object when an exception is analysed by register_exception().

Reviewed-by: Tibor Simko <tibor.simko@cern.ch>
Merge branch 'maint-1.0' into maint-1.1

* maint-1.0:
  errorlib: hiding bibcatalog info in exception body

Conflicts:
	modules/miscutil/lib/errorlib.py