Adding old unit tests to test suite.

These tests are copied straight over. They'll still run, but they're
using the old system.

Change-Id: If494519e52ddf858a9febfc55bdae830468cb3c8
diff --git a/test/031-class-attributes/src/OtherClass.java b/test/031-class-attributes/src/OtherClass.java
new file mode 100644
index 0000000..0b4526e
--- /dev/null
+++ b/test/031-class-attributes/src/OtherClass.java
@@ -0,0 +1,2 @@
+class OtherClass {
+}