As you have created a WAR there is no specific config required? I take it you have all the config to connect to the database inside your Spring/Datasource config?
So the simplest solution would be to copy the WAR file manually :)
mvn clean package
cp target/build-name.war /yourtomcathome/webapps
restart tomcat (depends if you have installed as service) e.g.
sudo service tomcat restart