Add checks for *DecisionAttributes within RespondDecisionTaskCompleted

tests/test_swf/test_utils.py

@@ -0,0 +1,11 @@
+from sure import expect
+from moto.swf.utils import decapitalize
+
+def test_decapitalize():
+    cases = {
+        "fooBar": "fooBar",
+        "FooBar": "fooBar",
+        "FOO BAR": "fOO BAR",
+    }
+    for before, after in cases.iteritems():
+        decapitalize(before).should.equal(after)