write ownable simple test

test/ownable.js

@@ -0,0 +1,11 @@
+contract('Ownable', function(accounts) {
+  it("should have an owner", function(done) {
+    var ownable = Ownable.deployed();
+    return ownable.owner()
+    .then(function(owner) {
+      assert.isTrue(owner != 0);
+    })
+    .then(done)
+
+  });
+});