Enable tests on Edit Distance and TIE EDA

These tests are conducted by using the Runner class being able to call those EDAs
so that EDAs can be tested when they are called in the same manner.
FixedWeightEditDistance exposes its main parameters in the constructor. Now
it can be used with other EDAs.
TestRunner_MaxEnt_DE and TestRunner_MaxEnt_EN.java have been disabled because
TIE doesn't allow rewriting an existing model.
Merge pull request #321 from rzanoli/master

Enable tests for Edit Distance EDA