[ADD] calendar migration (wip)
[IMP] use renamed modules from openupgrade_records
[IMP] use renamed modules from openupgrade_records
[FIX] coding style
[ADD] meeting migration to events works
[ADD] migrate calendar attendees
[ADD] migration alarms work
[ADD] move deprecated columns to legacy fields
[ADD] map changed selection values
[FIX] map crm.meeting's messages to calendar.events
Merge remote-tracking branch 'origin/8.0' into 8.0-calendar
[ADD] declare the calendar module being ported
[IMP] adapt spelling/fomratting in rst file
[ADD] hr_holidays migration
[FIX] import openupgrade
[ADD] openupgrade_analysis_work.txt
[FIX] revert fixing other module's coverage entries
[FIX] fluke in modules70-80.rst
[ADD] load noupdate data
[FIX] correctly migration relation between alarms and events
[FIX] call set_message_last_post at the end to avoid errors from not yet
recomputed fields
[FIX] cope with duration==null