Updated User Agent & More Samples for Billing Plans

- Fixed versioning in User Agent.
- Updated Billing Plan sample to update Payment definitions
- Docs & Tests

tests/PayPal/Test/Functional/resources/BillingPlansFunctionalTest/testUpdateChangingState.json

@@ -1,37 +1,36 @@
 {
-    "description" : "This operation changes the state of billing plan to active if its in created state.",    
-    "title" : "Patch Request for changing state",
-    "runnable" : true, 
-    "operationId" : "plan.update", 
-    "user" : { 
-        "scopes" : ["https://uri.paypal.com/services/subscriptions" ]  
+    "description": "This operation changes the state of billing plan to active if its in created state.",
+    "title": "Patch Request for changing state",
+    "runnable": true,
+    "operationId": "plan.update",
+    "user": {
+        "scopes": ["https://uri.paypal.com/services/subscriptions"]
     },
-    "credentials" : {  
+    "credentials": {
         "oauth": {
-            "path" : "/v1/oauth/token",  
-            "clientId":"",    
-            "clientSecret":""
+            "path": "/v1/oauth/token",
+            "clientId": "",
+            "clientSecret": ""
         }
     },
-    "request" : {
-        "path" : "v1/payments/billing-plans/{PLAN-ID}/",
-        "method" : "PATCH",
-        "headers" : {},
-        "body" : 
-        [
-	   {
-	     "op":"replace",
-	     "path":"/",
-	     "value":{
-	       "state":"ACTIVE"
-	     }   
-	   } 
-	]
+    "request": {
+        "path": "v1/payments/billing-plans/{PLAN-ID}/",
+        "method": "PATCH",
+        "headers": {},
+        "body": [
+            {
+                "op": "replace",
+                "path": "/",
+                "value": {
+                    "state": "ACTIVE"
+                }
+            }
+        ]
     },
-    "response" : {
-        "status" : "200 OK",
-        "headers" : {},
-        "body" : { }
+    "response": {
+        "status": "200 OK",
+        "headers": {},
+        "body": {}
     }
 }