Adding "readyToProcess" field to `Payment`
Add TODO statements to remember to remove logging from `Payment` objects
 - Remove processPayment calls from Registraiton endpoints
Rearranging payment processing into the create and update payment endpoints.
Upgrade to httpClient v4.3.1
Alter this class to use v4.3.1 of HttpClient and remove injection stuff.  Static declaration is just fine here.
Change transaction id data type from text to bigint
should have been included with last commit...
Remove old imports of httpcommons HttpClient
 - change type from 'Boolean' to 'boolean' for `Payment`.isReadyToProcess
 - return payments on get current registration endpoint