two Customers with identical fields, isEqualTo:
  expected: "Customer{id=7, name=Asha Patil, email=asha@example.com, address=Address[street=12 MG Road, city=Pune, postcode=411001], tags=[vip, newsletter], creditLimit=5000.00} (Customer@73c3cd09)"
   but was: "Customer{id=7, name=Asha Patil, email=asha@example.com, address=Address[street=12 MG Road, city=Pune, postcode=411001], tags=[vip, newsletter], creditLimit=5000.00} (Customer@74f827ad)"
