added flag to activity in grammar

...hesis/ide/contentassist/antlr/TestgeneratorDSLParser.java

...e/contentassist/antlr/internal/InternalTestgeneratorDSL.g

...tentassist/antlr/internal/InternalTestgeneratorDSL.tokens

...tassist/antlr/internal/InternalTestgeneratorDSLLexer.java

...assist/antlr/internal/InternalTestgeneratorDSLParser.java

...ster/masterthesis/ide/.TestgeneratorDSLIdeModule.xtendbin

...nster/masterthesis/ide/.TestgeneratorDSLIdeSetup.xtendbin

...s.textgeneratordsl/model/generated/TestgeneratorDSL.ecore

...extgeneratordsl/model/generated/TestgeneratorDSL.genmodel

...-gen/de/fhmuenster/masterthesis/TestgeneratorDSL.xtextbin

...erthesis/parser/antlr/internal/InternalTestgeneratorDSL.g

...sis/parser/antlr/internal/InternalTestgeneratorDSL.tokens

.../parser/antlr/internal/InternalTestgeneratorDSLLexer.java

...parser/antlr/internal/InternalTestgeneratorDSLParser.java

.../masterthesis/services/TestgeneratorDSLGrammarAccess.java

...gen/de/fhmuenster/masterthesis/testgeneratorDSL/Flag.java

...hesis/testgeneratorDSL/impl/FlowElementReferenceImpl.java

...muenster/masterthesis/testgeneratorDSL/impl/FlowImpl.java

...is/testgeneratorDSL/impl/TestgeneratorDSLPackageImpl.java

...dsl/src/de/fhmuenster/masterthesis/TestgeneratorDSL.xtext