Fix test to be more valid

Fix test to be more valid

I've added a check to run after tests & before tearDown to ensure that all payments have the
right entity_financial_trxn records.

This required fixing one ttest to be valid. It's not possible to create a contribution using the
back office for with status set to Partially Paid (it's not an option in the drop down, so
the test should create as Pending & then add a payment to get to partially paid