Add payment controller stack.

[systemtesting9000]

This pull request attempts to fulfill the following Trello requirements:

• Create Payment Controller
• Create Payment Retrieve GET API
• Create Payment Service
• Create Payment Repository
• Ensure Retrieve API is Working
• Write jUnit to Test Implementation
• Raise PR into Original Repository when done (this is for

API Working Screentshot (from Swagger UI):

Tests - JUnit and Maven:

Notes:
-Did not add a full set of validation for the incoming user id, but at least had a check for blank. This could be improved.
-There seemed to be a defect in the ResourceMapper, it would pump out the last five characters of a credit card, I switched it to four and added a test for that. (Unless I am misunderstanding the data.)
-Added test data to the sql test file.
-Ran the IntelliJ remove imports/reformat -- but did not run format on exiting updated files just new.
-Also fixed what quality complaints IntelliJ had.
-Confirmed the maven and the IDE build steps, as this can be an issue on some code bases but not this.
-The requirements said "#3 Payment Retrieve API should return all data for a given User." I made the assumption this was just payment data for a user and not user + payment data all in one shot. If this isn't what was expected I'd probably make a composition type object to accomplish this with the code, i.e.

UserPaymentsDto{
UserDto user;
List payments;
}

but canonically payment seems to imply payment only.