add billing informations details
Merge branches 'master' and 'master' of https://github.com/PSD-RTS/simple-petstore-avengers

Conflicts:
	domain/src/main/java/org/testinfected/petstore/billing/Address.java
	domain/src/test/java/test/support/org/testinfected/petstore/builders/AddressBuilder.java
	webapp/src/main/java/org/testinfected/petstore/views/Checkout.java