Add Spring boot dependencies to PURL
Add Spring boot dependencies to PURL

Summary:
- rename PURL to Resolver
- change the packaging type from war to jar
- add parent tag
- add spring-boot-starter-web
- add spring-boot-starter-data-jpa
- add h2 dependency
- add spring-boot-maven-plugin
- remove Springframework dependencies
- remove Springframeowkr test dependency
- remove Hibernate dependency
- remove servlet+JSP+JSTL dependencies
- remove jsr303 dependency

Khyzad/PID-webservice,HawaiiStateDigitalArchives/PID-webservice,Khyzad/PID-webservice,HawaiiStateDigitalArchives/PID-webservice