Upgrade to Grails framework version 2.3.9.
Major package refactoring and removal of the obsolete NBIS helper library from the project.
Add the constants for finger position and image type to the project.
Minor fix for the migrant interception marshaller.
Upgrade MySQL Connector/J to version 5.1.30.
Upgrade Tomcat plugin to version 7.0.53.
Upgrade Grails mail plugin to version 1.0.5.