Add H2 dependency
Add H2 dependency

Removed hsqldb dependency

resolves spring-cloud/spring-cloud-task-modules#15

spring-cloud/spring-cloud-task-modules,spring-cloud/spring-cloud-task-modules,cppwfs/spring-cloud-task-modules,trisberg/spring-cloud-task-modules,cppwfs/spring-cloud-task-modules,trisberg/spring-cloud-task-modules