Bug fixes for QA
QA Notes:
- Return value for checkValidReceipt where flipped and is now fixed
- Campaign Contributions and Event Fees cannot have tax receipts issued, but this was part of the original CDNTaxReceipts extension and is not a concern
- Query for status_id to check if user is registered was referencing the wrong table and is now fixed
- Parameter for Scheduled Job query had a syntax error and is now fixed
- isValid check for contribution when executing Scheduled job returns an array containing true/false at index 0. Conditional statement fixed to access the value at index 0.