Turn off HTTP headers by default

src/main/edu/wisc/doit/uwphps/UserDetailsProvider.php

@@ -27,7 +27,7 @@ abstract class UserDetailsProvider
      * UserDetailsProvider constructor.
      * @param $http
      */
-    public function __construct($http = true)
+    public function __construct($http = false)
     {
         $this->httpHeaders = $http;
     }

src/test/edu/wisc/doit/uwphps/preauth/HTTPFederatedPreauthUserDetailsProviderTest.php

@@ -26,7 +26,7 @@ class HTTPFederatedPreauthUserDetailsProviderTest extends \PHPUnit_Framework_Tes
         }
 
         $this->attributes = json_decode($jsonString, true);
-        $this->userProvider = new FederatedPreauthUserDetailsProvider();
+        $this->userProvider = new FederatedPreauthUserDetailsProvider(true);
 
         putenv($this->mapAttribute(UserDetailsProvider::EPPN) . '=' . $this->attributes[$this->mapAttribute(UserDetailsProvider::EPPN)]);
         putenv($this->mapAttribute(FederatedPreauthUserDetailsProvider::SPVI) . '=' . $this->attributes[$this->mapAttribute(FederatedPreauthUserDetailsProvider::SPVI)]);