CRM-14007 add handling from d7 for activity contact
add activity table def from d7 to cope with activity_contact changes
Merge pull request #108 from eileenmcnaughton/CRM-14007

Crm 14007 - update views for activity contact restructure
Merge remote-tracking branch 'upstream/6.x-4.4' into 6.x-4.4-6.x-master-2014-01-18-17-01-52