Merge pull request #854 from dennishendriksen/master

Big fux: add null check
Update spring 3.2.3 to 3.2.4, spring security 3.2.0-RC1 to 3.2.0-RC2, spring data commons core 1.4.1 to 1.6.2
define spring versions in parent pom, update sql java connector
mysql connector version property