Separating front et server into 2 maven modules

...amework/samples/petclinic/repository/OwnerRepository.java

...framework/samples/petclinic/repository/PetRepository.java

...framework/samples/petclinic/repository/VetRepository.java

...amework/samples/petclinic/repository/VisitRepository.java

...ingframework/samples/petclinic/service/ClinicService.java

...ramework/samples/petclinic/service/ClinicServiceImpl.java

...ramework/samples/petclinic/util/CallMonitoringAspect.java

.../springframework/samples/petclinic/web/OwnerResource.java

...rg/springframework/samples/petclinic/web/PetResource.java

...g/springframework/samples/petclinic/web/PetValidator.java

...rg/springframework/samples/petclinic/web/VetResource.java

.../springframework/samples/petclinic/web/VisitResource.java

...etclinic-server/src/main/resources/application.properties

springboot-petclinic-server/src/main/resources/banner.txt

...ot-petclinic-server/src/main/resources/db/hsqldb/data.sql

...-petclinic-server/src/main/resources/db/hsqldb/schema.sql

...oot-petclinic-server/src/main/resources/db/mysql/data.sql

.../src/main/resources/db/mysql/petclinic_db_setup_mysql.txt

...t-petclinic-server/src/main/resources/db/mysql/schema.sql

springboot-petclinic-server/src/main/resources/db_readme.txt