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

compiler/testData/loadJavaCustom/enum/expected.txt

@@ -0,0 +1,14 @@
+namespace test
+
+public final enum class test.MyEnum : jet.Enum<test.MyEnum> {
+    private final /*constructor*/ fun <init>(): test.MyEnum
+    public final override /*1*/ fun name(): jet.String
+    public final override /*1*/ fun ordinal(): jet.Int
+    public final class object test.MyEnum.<class-object-for-MyEnum> {
+        private final /*constructor*/ fun <init>(): test.MyEnum.<class-object-for-MyEnum>
+        public final val ANOTHER: test.MyEnum
+        public final val ENTRY: test.MyEnum
+        public final fun valueOf(/*0*/ value: jet.String): test.MyEnum
+        public final fun values(): jet.Array<test.MyEnum>
+    }
+}

compiler/testData/loadJavaCustom/enum/java/MyEnum.java

@@ -0,0 +1,6 @@
+package test;
+
+public enum MyEnum {
+    ENTRY,
+    ANOTHER;
+}