Fix cache references and correct subnet names.

cloudformation_templates/edx-reference-architecture.json

@@ -5194,13 +5194,13 @@
         "Type" : "AWS::ElastiCache::SubnetGroup",
         "Properties" : {
             "Description" : "Cache Subnet Group",
-            "SubnetIds" : [ { "Ref" : "CacheSubnet01" }, { "Ref" : "CacheSubnet02" }  ]
+            "SubnetIds" : [ { "Ref" : "Cache01" }, { "Ref" : "Cache02" }  ]
         }
     },
     "CacheCluster" : {
       "Type": "AWS::ElastiCache::CacheCluster",
       "Properties": {
-        "NumCacheNodes"        : { "Ref" : "NumberOfCacheNodes" }
+        "NumCacheNodes"        : { "Ref" : "NumberOfCacheNodes" },
         "CacheNodeType"        : { "Ref" : "CacheNodeType" },
         "Engine"               : "memcached",
         "EngineVersion": "1.4.5",
@@ -5212,9 +5212,9 @@
           ]
         },
         "CacheParameterGroupName": "default.memcached1.4",
-        "AutoMinorVersionUpgrade": true
+        "AutoMinorVersionUpgrade": true,
         "CacheSubnetGroupName" : { "Ref" : "CacheSubnetGroup" },
-        "VpcSecurityGroupIds"  : [ { "Ref" : "CacheSecurityGroup" } ],
+        "VpcSecurityGroupIds"  : [ { "Ref" : "CacheSecurityGroup" } ]
       }
     }
   },