chore(pom): Align database dependency versions

- specify database dependency versions in root pom
- remove restlet dependencies
chore(postgresql): Use postgresql driver available in maven central
chore(maven): Upgrade surefire/failsafe plugin versions
fix(engine-rest): Use different test executions for each JAX-RS provider

- use different test executions to isolate classpath issue which can arise when the different JAX-RS provider are used in a common classpath
fix(glassfish-xa): create database before engine-ITs execute on glassfish

related to CAM-984