Fix support for accounts with multiple calendars
Fix current specs
Add specs for GoogleIntegration#set_default_calendar
Merge pull request #106 from CruGlobal/fix_multiple_calendar_support

Fix support for accounts with multiple calendars
When someone picks a calendar to sync to other than their default, adding attendees causes
it to show up on their default calendar as well.  This commit removes all attendees from
the event.
Remove unnecessary specs
Remove logger line