Beginning of Payments and associated methods

Began to create the method to make a payment by finding the cost of a
job through their ID

For that to work, I had to create other variables in the Service class
and interface, and their associated accessors and mutators
More refinements to Payment
Changed payment

Still problematic
Another measly attempt on the payment method

Found out that the for loop used to make payments is what was causing
issues.

Made another attempt at making payments but it doesnt seem to deduct the
amount entered from the amount owed
Payment method works!

Although unorthodox, it works...mostly

Need to make a conditional statement in regards to Amount Owed being 0
Can now find ID through multiple arraylists

Its messy sadly