Add tags to the RDS.

cloudformation_templates/edx-reference-architecture.json

@@ -3866,6 +3866,25 @@
             "Ref":"DBSecurityGroup"
           }
         ],
+        "Tags":[
+          {
+            "Key":"role",
+            "Value":"rds",
+            "PropagateAtLaunch":true
+          },
+          {
+            "Key":"environment",
+            "Value":{
+              "Ref":"EnvironmentTag"
+            }
+          },
+          {
+            "Key":"deployment",
+            "Value":{
+              "Ref":"DeploymentTag"
+            }
+          }
+        ],
         "MultiAZ":"true"
       }
     },