CRM-15259 use same method to determine whether to show updateBilling link as whether to allow access to form
Merge pull request #4071 from eileenmcnaughton/CRM-15259

CRM-15259 use same method to determine whether to show updateBilling lin...
Merge remote-tracking branch 'upstream/4.4' into 4.4-4.5-2014-09-29-13-10-47

Conflicts:
	CRM/Core/Payment.php