Support for Testsuite-Syntax #5
Description
Refactor GSpec to separate language: https://github.com/eclipse/xtext/blob/master/tests/org.eclipse.xtext.testlanguages/src/org/eclipse/xtext/testlanguages/GenerateTestLanguages.mwe2 and https://github.com/eclipse/xtext/blob/master/tests/org.eclipse.xtext.testlanguages/src/org/eclipse/xtext/testlanguages/noJdt/NoJdtTestLanguage.mwe2
Then add a new one for Testsuite-Syntax