Reversed some changes, that caused problems with existing DoFvariation

...descartes/dql/core/engine/whatif/WhatIfFilterFactory.java

...rc/tools/descartes/dql/core/engine/whatif/WhatIfUtil.java

...ui/contentassist/AbstractDescartesQLProposalProvider.java

...es/dql/lang/ui/contentassist/antlr/DescartesQLParser.java

...ang/ui/contentassist/antlr/internal/InternalDescartesQL.g

...ontentassist/antlr/internal/InternalDescartesQLLexer.java

...ntentassist/antlr/internal/InternalDescartesQLParser.java

...ools.descartes.dql.lang/model/generated/DescartesQL.ecore

...s.descartes.dql.lang/model/generated/DescartesQL.genmodel

...ang/src-gen/tools/descartes/dql/lang/DescartesQL.xtextbin

...ools/descartes/dql/lang/descartesQL/ArithmeticClause.java

...ls/descartes/dql/lang/descartesQL/DescartesQLFactory.java

...ls/descartes/dql/lang/descartesQL/DescartesQLPackage.java

...en/tools/descartes/dql/lang/descartesQL/FilterigRule.java

...n/tools/descartes/dql/lang/descartesQL/VariableValue.java

...artes/dql/lang/descartesQL/impl/ArithmeticClauseImpl.java

...tes/dql/lang/descartesQL/impl/DescartesQLFactoryImpl.java

...tes/dql/lang/descartesQL/impl/DescartesQLPackageImpl.java

...descartes/dql/lang/descartesQL/impl/FilterigRuleImpl.java

...escartes/dql/lang/descartesQL/impl/VariableValueImpl.java