set conqat color to yellow

...src/org/fortiss/tooling/base/utils/ModelElementUtils.java

.../fortiss/tooling/kernel/extension/IConstraintChecker.java

.../tooling/kernel/extension/base/ConstraintCheckerBase.java

...ooling/kernel/extension/base/ConstraintViolationBase.java

...iss/tooling/kernel/internal/ConstraintCheckerService.java

...c/org/fortiss/tooling/kernel/utils/ModelElementUtils.java

...k/src/org/fortiss/tooling/kernel/utils/ResourceUtils.java