Test for KT-2529 Support importing enum members using wildcard

#KT-2529 Fixed

compiler/testData/diagnostics/tests/enum/enumStarImport.kt

@@ -0,0 +1,20 @@
+// FILE: enum.kt
+
+package enum
+
+enum class HappyEnum {
+    CASE1
+    CASE2
+}
+
+// FILE: user.kt
+
+import enum.HappyEnum
+import enum.HappyEnum.*
+
+fun f(e: HappyEnum) {
+    when (e) {
+        CASE1 -> throw UnsupportedOperationException() // unresolved reference
+        CASE2 -> throw UnsupportedOperationException() // unresolved references
+    }
+}