Added property-related tests

plugins/org.eclipse.epsilon.eol.staticanalyser.tests/src/org/eclipse/epsilon/eol/staticanalyser/tests/scripts/propertyAssignment.eol

@@ -0,0 +1,19 @@
+model M driver EMF {nsuri="http://www.eclipse.org/emf/2002/Ecore"};
+
+var p : EPackage;
+var c : EClass;
+
+p = c.ePackage;
+c = p.eClassifiers.op1();
+c = p.eClassifiers.op2();
+
+operation Any op1() : EClass {
+	// If I comment out the following line I get a "_NOTYPE cannot be assigned to EClass" error which doesn't look right
+	return new EClass;
+	// If I comment out the line above and uncomment the line below, I also get a "_NOTYPE cannot be assigned to EClass" error
+	// return self.op1();
+}
+
+operation Collection<EClassifier> op2() : EClass {
+	return new EClass;
+}