bug fixes to cache commands

cloudformation_templates/edx-reference-architecture.json

@@ -2578,7 +2578,7 @@
             "IpProtocol":"tcp",
             "FromPort":"5672",
             "ToPort":"5672",
-            "SourceSecurityGroupID" : {
+            "SourceSecurityGroupId" : {
 		"Ref" : "RabbitMQELBSecurityGroup" 
 	    }
           },
@@ -3139,13 +3139,13 @@
             {
               "Ref":"EdxVPC"
             },
-            "_ElasticCacheSubnetGroup --description  'VPC ElasticCache Subnet Group'",
-            "--subnet-ID-list",
+            "-ElasticCacheSubnetGroup --description  'VPC ElasticCache Subnet Group'",
+            " --subnet-ID-list",
             " ",
             {
               "Ref":"Cache01"
             },
-            " ",
+            ",",
             {
               "Ref":"Cache02"
             }
@@ -3164,7 +3164,7 @@
             {
               "Ref":"EdxVPC"
             },
-            "_ElacticCacheCluster --num-cache-nodes ",
+            "-Cache --num-cache-nodes ",
             {
               "Ref":"NumberOfCacheNodes"
             },
@@ -3175,7 +3175,11 @@
             " --engine memcached --engine-version 1.4.5 --port 12345 --preferred-availability-zone us-east-1b",
             " --cache-parameter-group-name default.memcached1.4 --auto-minor-version-upgrade true",
             " --cache-subnet-group-name ElasticCacheSubnetGroup",
-            "bar"
+            " ",
+            {
+              "Ref":"EdxVPC"
+            },
+            "-ElasticCacheSubnetGroup"
           ]
         ]
       }