Build 200703271800

Rename Type A to B should return a warning when another type named B is 
referenced in A.java
Steps to reproduce: Rename Type A to B in the following:
class A{
}
class X{
	class B{
	}
	A a;
}

yields the following refactored class:
package p;
class B{
}
class X{
	class B{
	}
	B a;
}

Note: The same problem occurs when there is a field or a parameter or a local 
variable or a return type or a throws statement or another expression 
statement including type A in class X.