Upgrade default jdk install from jdk-6u16 to jdk-6u45 because jdk6u16 is outdated.
Added static final DEFAULT_JDK variable containing default jdk install id.
Fix hard coded jdk version in logging.
Create JDKVERSION variable.
Merge pull request #15 from christ66/master

Upgrade default jdk install from jdk-6u16 to jdk-6u45 because jdk6u16 is outdated.