Added test for describe_events.rb. It is very simple, and I'm not familiar with Shindo, so may need some assistance expanding

tests/aws/requests/rds/describe_events.rb

@@ -0,0 +1,16 @@
+Shindo.tests('AWS::RDS | describe DB events requests',['aws', 'rds']) do
+
+  tests('success') do
+    pending if Fog.mocking?
+
+    tests(
+    '#describe_events'
+    ).formats(AWS::RDS::Formats::EVENT_LIST) do
+      AWS[:rds].describe_events().body['Events']
+    end
+  end
+
+  tests('failure') do
+    #TODO: What constitutes a failure here? 
+  end
+end