Renaming Namespaces and Organizing Classes

- Updated OpenId classes to be in API namespace
- Updated PP Naming Convention to PayPal Naming Convention
- FormatConverter Class got its own namespace
- Handlers are grouped in Handler namespace
- Samples and Tests Updated Accordingly

sample/lipp/GetUserInfo.php

@@ -3,8 +3,8 @@
 // ### Obtain Access Token From Refresh Token
 require __DIR__ . '/../bootstrap.php';
 
-use PayPal\Auth\Openid\PPOpenIdUserinfo;
-use PayPal\Auth\Openid\PPOpenIdTokeninfo;
+use PayPal\Api\OpenIdUserinfo;
+use PayPal\Api\OpenIdTokeninfo;
 
 // To obtain User Info, you have to follow three steps in general.
 // First, you need to obtain user's consent to retrieve the information you want.
@@ -22,11 +22,11 @@ $refreshToken = 'yzX4AkmMyBKR4on7vB5he-tDu38s24Zy-kTibhSuqA8kTdy0Yinxj7NpAyULx0b
 
 try {
 
-    $tokenInfo = new PPOpenIdTokeninfo();
+    $tokenInfo = new OpenIdTokeninfo();
     $tokenInfo = $tokenInfo->createFromRefreshToken(array('refresh_token' => $refreshToken), $apiContext);
 
     $params = array('access_token' => $tokenInfo->getAccessToken());
-    $userInfo = PPOpenIdUserinfo::getUserinfo($params, $apiContext);
+    $userInfo = OpenIdUserinfo::getUserinfo($params, $apiContext);
 
 } catch (Exception $ex) {
     ResultPrinter::printError("User Information", "User Info", null, $params, $ex);