CRM-17718 update repeattransaction to accept contribution_recur_id instead of origina...

CRM-17718 update repeattransaction to accept contribution_recur_id instead of original_contribution_id
wq
I feel like passing in the contribution_recur_id actually makes more sense - the internals of which contribution is repeated should be 'core business' & consistent across processors.

Importantly it has been set here to repeat the latest rather than the earliest which is not as good as saving such things as line items against the recurring transaction but
better than using the earliest - ie. pick up changes over time

Conflicts:
	tests/phpunit/api/v3/ContributionTest.php