Rename test data folder according to the new test naming convention.

compiler/testData/loadJava/kotlinSignature/MethodWithVararg.java

@@ -0,0 +1,15 @@
+package test;
+
+import java.lang.String;
+import java.lang.UnsupportedOperationException;
+import java.util.*;
+import java.util.BitSet;
+import java.util.List;
+
+import jet.runtime.typeinfo.KotlinSignature;
+
+public class MethodWithVararg {
+    @KotlinSignature("fun foo(vararg s : String)")
+    public void foo(String... s) {
+    }
+}