In "pom.xml" and "VadereGui/pom.xml", use latest version of Maven's Mockito plugin to avoid mocking errors during unit test phase.

See:
- https://github.com/calypsonet/keyple-java/issues/443
- https://mvnrepository.com/artifact/org.mockito/mockito-core
- https://mvnrepository.com/artifact/org.mockito/mockito-all/1.9.5