Fix failing snippets in /wireless and activate testing

Author: hortega

wireless/commands/create-example-1/create-example-1.curl renamed to wireless/commands/create-example-1/create-example-1.json.curl

@@ -7,7 +7,6 @@
 
 client = Client(account_sid, auth_token)
 
-commands = client.preview.wireless.commands('DCAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA')\
-            .list()
+commands = client.preview.wireless.commands.list()
 
 print(commands)

wireless/commands/instance-get-example-1/instance-get-example-1.curl renamed to wireless/commands/instance-get-example-1/instance-get-example-1.json.curl

@@ -9,7 +9,7 @@ client.preview.wireless.ratePlans
     uniqueName: 'SmartMeterCA',
     friendlyName: 'California SmartMeter Plan',
     dataLimit: 5,
-    messagingEnabled: true
+    messagingEnabled: 'true'
   })
   .then(function(response) {
     console.log(response);

wireless/commands/list-example-1/list-example-1.6.x.py

@@ -12,4 +12,4 @@
     ->ratePlans('WPAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA')
     ->fetch();
 
-prin_r($ratePlan);
+print_r($ratePlan);