title: PayPal rest api, PHP SDK, billing, I get error REQUIRED_SCOPE_MISSING
body: <p>I am getting an error REQUIRED_SCOPE_MISSING 
  when executing PayPal's sample/billing/CreatePlan.php with
  my own clientId and secret.  It works fine using
  the provided clientId and secret. </p>
  
  <p>REPRODUCE BY:</p>
  
  <p>Download PayPal-PHP-SDK v0.14.2</p>
  
  <p>go to  sample/billing</p>
  
  <p>run<br>
  php CreatePlan.php</p>
  
  <p>Line 9 on this file includes the 
  bootstrap.php program. This is 
  where the clientId and secret are defined.</p>
  
  <p>If I use the existing clientId and secret
  it will work fine.  If I substitute in my
  own clientId and secret it will give the
  error message shown here.   </p>
  
  <pre><code>[myprompt]$ php CreatePlan.php
  Warning: This sample may require a server to handle return URL. Cannot execute in  command line. Defaulting URL to http://localhost/sample/billing
  
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  (1) CREATED PLAN
  -------------------------------------------------------------
  
  -------------------------------------------------------------
      REQUEST:
  {"name":"T-Shirt of the Month Club Plan","description":"Template       creation.","type":"fixed",
  "payment_definitions":[{"name":"Regular Payments","type":"REGULAR","frequency":"Month",
  "frequency_interval":"2","cycles":"12","amount":{"value":"100.00","currency":"USD"},
  "charge_models":[{"type":"SHIPPING","amount":{"value":"10.00","currency":"USD"}}]}],
  "merchant_preferences":{"return_url":"http://localhost/sample/billing /ExecuteAgreement.php?success=true",
  "cancel_url":"http://localhost/sample/billing/ExecuteAgreement.php?success=false","auto_bill_amount":"yes","initial_fail_amount_action":    "CONTINUE","max_fail_attempts":"0","setup_fee":{"value":"1.00","currency":"USD"}}}
  
      RESPONSE:
  ERROR:Got Http response code 403 when 
  accessing https://api.sandbox.paypal.com/v1/payments/billing-plans/.    {"name":"REQUIRED_SCOPE_MISSING",
  "message":"Access token does not have required scope",
  "information_link":"https://developer.paypal.com/webapps/developer/docs/api  /#REQUIRED_SCOPE_MISSING","debug_id":"261257fb27891"}
  -------------------------------------------------------------
  </code></pre>
  
  <p>My own clientId and secret work fine with all
  the payment samples.</p>