added dependency to default domain

test-plugins/org.yakindu.sct.model.sgraph.test/META-INF/MANIFEST.MF

@@ -9,7 +9,8 @@ Require-Bundle: org.yakindu.sct.model.sgraph,
  org.eclipse.core.runtime,
  org.yakindu.sct.model.stext,
  org.eclipse.xtext.junit4,
- org.yakindu.sct.domain.generic.resource
+ org.yakindu.sct.domain.generic.resource,
+ org.yakindu.sct.domain.generic
 Bundle-ActivationPolicy: lazy
 Bundle-RequiredExecutionEnvironment: JavaSE-1.8
 Bundle-Vendor: statecharts.org