Study the adoption of java-side assertions

[danielfernandez]

As a further step into JUnit / Java-side integration of thymeleaf tests, it could be studied whether it would be possible to use assertions like the ones provided by Hamcrest http://hamcrest.org/JavaHamcrest/ in order to specify test results.

Such assertions would probably have to be executed on the normalised sequences of events parsed from the execution results. If such thing is possible.