Finished the implementation of the model checker validator and of the associated tests

...anslator/modelcheckervalidator/ModelCheckerValidator.java

src/main/java/cli/Action.java

src/main/java/ui/window/JDialogAvatarModelChecker.java

ttool/src/test/java/cli/CLIAvatarModelCheckerTest.java

.../src/test/resources/cli/expected/modelchecker_rl_expected

...l/src/test/resources/cli/expected/modelchecker_s_expected

ttool/src/test/resources/cli/input/scriptmodelchecker_val1

ttool/src/test/resources/cli/input/scriptmodelchecker_val2