Scheduled reminders for "Also Include <Contact>" sent prematurely

(Assigning to Coleman for triage.)

Steps to reproduce:

1. Checkout https://github.com/civicrm/civicrm-core/pull/7683 ( aka https://github.com/totten/civicrm-core/tree/master-16514-tests/ )
2. Run "./scripts/phpunit --group ActionSchedule CRM_AllTests"
3. Observe: CRM_Contribute_ActionMapping_ByTypeTest fails in scenario "addAliceDues scheduleForAny startOnTime useHelloFirstName alsoRecipientBob"

That's a bit terse; in English, that's like:

1. Create contacts Alice and Bob.
2. Add a contribution record (type==Dues) for Alice (with receipt date on Feb 1).
3. Create a scheduled reminder to deliver on the contribution receipt-date.
4. Set the scheduled reminder to send an email ("Hello, {first name}

   ").

5. Set the scheduled reminder to also include Bob.
6. Manipulate the clock and perform several cron-runs (once a day from Jan 20 to Mar 1).

Notes:

• For more discussion of the test, see the docblocks in https://github.com/totten/civicrm-core/blob/master-16514-tests/tests/phpunit/Civi/ActionSchedule/AbstractMappingTest.php
• In 4.7, the query-builder moved to Civi\ActionSchedule\RecipientBuilder. In particular, buildAddlFirstPass() and buildAddlRepeatPass() handle messages for "Also Include" functionality.

(This issue is an offshoot from CRM-16514.)