Fix Duplicate Financial Item For Membership Payments

[shahrukh-compuco]

Overview

This pr fixes an issue that results in duplicate financial items creation. To reproduce the issue create a membership for a contact with pending payment status and check that one financial item gets created then pay for the contribution through a contribution page now check the financial item table there will be an exact duplicate of financial item that was created previously.

Technical Details

The issue here is that in contribution confirm page we check if there is any active membership for the user and if there isn't one we treat it as new membership creation whereas there exists one more scenario when user is paying for a pending contribution and in this scenario we should not treat it as new membership creation.

[civibot]

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