execute "mvn clean" and "mvn install" separately in build plan

as opposed to specifying |clean install| as goals in a build plan which leads to
$ mvn clean install

the maven targets should be separated so there are 2 or more iteration of maven: |clean | install | which would lead to:
$ mvn clean
$ mvn install

This ensures that all modules are cleaned before the install. Otherwise clean install is run on a module by module basis.