Added circular import resolution test that now passes.

python/testData/resolve/multiFile/circularImport/CircularImport.py

@@ -0,0 +1,4 @@
+import x
+
+x.y.z.token
+#     <ref>

python/testData/resolve/multiFile/circularImport/x.py

@@ -0,0 +1,2 @@
+import y
+X = "X"

python/testData/resolve/multiFile/circularImport/y.py

@@ -0,0 +1,3 @@
+import z
+
+Y="Y"

python/testData/resolve/multiFile/circularImport/z.py

@@ -0,0 +1,3 @@
+import x
+token="Z"
+

python/testSrc/com/jetbrains/python/PyMultiFileResolveTest.java

@@ -89,14 +89,12 @@ public class PyMultiFileResolveTest extends CodeInsightTestCase {
     assertTrue(element instanceof PyFunction);
   }
 
-  /*
   // Currently fails due to inadequate stubs
   public void testCircularImport() throws Exception {
     PsiElement element = doResolve();
     assertTrue(element instanceof PyTargetExpression);
   }
-  */
-  
+
 
   private PsiElement doResolve() throws Exception {
     String testName = getTestName(true);