Merge pull request #8 from stfnsche/master

updated javax.mail.version from 1.4.4 to 1.5.0
[OPENENGSB-2793] use newer openjpa maven plugin
Merge pull request #10 from Arcticwolf/OPENENGSB-2793

[OPENENGSB-2793] use newer openjpa maven plugin
[OPENENGSB-3651] Provide easier method to release
Upgrade maven release plugin making sure that localCheckout property works correctly