URL Cleanup

...pringframework/samples/petclinic/owner/PetRepository.java

.../springframework/samples/petclinic/vet/VetRepository.java

...ingframework/samples/petclinic/visit/VisitRepository.java

src/main/resources/templates/error.html

...n/resources/templates/owners/createOrUpdateOwnerForm.html

src/main/resources/templates/owners/findOwners.html

src/main/resources/templates/owners/ownerDetails.html

src/main/resources/templates/owners/ownersList.html

src/main/resources/templates/pets/createOrUpdatePetForm.html

...ain/resources/templates/pets/createOrUpdateVisitForm.html

src/main/resources/templates/vets/vetList.html

src/main/resources/templates/welcome.html