Bug 72331 [1.5][Generalize Type Refactoring] Prevent refactoring of formal generic type parameters
The generalize type refactoring is not applicable to formal generic type parameters
org.eclipse.jdt.ui.tests.refactoring/resources/ChangeTypeRefactoring/positive/A_testParameterDeclWithOverride_out.java
import java.util.*;
class A_testParameterDeclWithOverride_in {
	static class X {
		public void foo(ArrayList v1){
			Collection c = v1;
		}
	}
	static class Y extends X {
		public void foo(ArrayList v2){
			v2 = new ArrayList();
		}
	}
}