Bug 120585 [clean up] needs two invocations until all clean ups are performed
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/quickfix/CleanUpTest.java
CleanUpRefactoring refactoring= new CleanUpRefactoring();
		refactoring.addCompilationUnit(cu1);
		refactoring.addCompilationUnit(cu2);
		
		ICleanUp cleanUp= new CodeStyleCleanUp(CodeStyleCleanUp.QUALIFY_FIELD_ACCESS);
		refactoring.addCleanUp(cleanUp);
		
		buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("public class E1 {\n");
		buf.append("    String s = \"\"; //$NON-NLS-1$\n");
		buf.append("    String t = \"\";  //$NON-NLS-1$\n");
		buf.append("    \n");
		buf.append("    public void foo() {\n");
		buf.append("        this.s = \"\"; //$NON-NLS-1$\n");
		buf.append("        this.s = this.s + this.s;\n");
		buf.append("        this.s = this.t + this.s;\n");
		buf.append("    }\n");
		buf.append("}\n");
		String expected1= buf.toString();
		
		buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("public class E2 extends E1{\n");
		buf.append("    int i = 10;\n");
		buf.append("    \n");
		buf.append("    public class E2Inner {\n");
		buf.append("        public void bar() {\n");
		buf.append("            int j = E2.this.i;\n");
		buf.append("            String k = E2.this.s + E2.this.t;\n");