Switch off springboot-petclinic-server, adjust client side urls to call API Gateway

petclinic-api-gateway/pom.xml

...amples/petclinic/api/infrastructure/config/WebConfig.java

...i-gateway/src/main/resources/messages/messages.properties

...ateway/src/main/resources/messages/messages_de.properties

...ateway/src/main/resources/messages/messages_en.properties

...linic-api-gateway/src/main/resources/templates/index.html

...mples/petclinic/clients/boundary/web/pet/PetResource.java

...es/petclinic/visits/boundary/web/visit/VisitResource.java

pom.xml

...ient/src/scripts/owner-details/owner-details.component.js

...nic-client/src/scripts/owner-form/owner-form.component.js

...tclinic-client/src/scripts/vet-list/vet-list.component.js

...t-petclinic-client/src/scripts/visits/visits.component.js