merged derby project into persistence to be able to choose between the derby connection pool and tomcat connection pool
removed derby module
Internalized creation of datasource
removed dependency on jetty-jndi
removed tomcat/glassfishs specific config as no config is needed except for ehour.properties
removed dbcp config
groupid is not needed when ther'es a parent defined
fixed tests
Merge branch 'feature/Datasource' into develop