Rename integration tests for missing dependencies
Pretty print the soapui project file

This will make track modification easier
Add tests to show missing dependency in 4.5.1
Fix missing guava dependency #62
Use common code in tests verification scripts

Move the scripts from beanshell to groovy (to have java5 features support)
WARN: the projet now depends on groovy 2.0.1 otherwise an issue occurs
with the maven invoker plugin when using groovy verification scripts
Restore use of groovy 1.8.0
Add 3.6.1 plugin tests to show #37
Update license year
Merge branch 'bug-62-missing-guava-dependency'