SDK-766: Correct test content type constant

Author: davidgrayston

tests/Util/Profile/AttributeConverterTest.php

@@ -17,7 +17,7 @@ class AttributeConverterTest extends TestCase
     /**
      * Content Types.
      */
-    const CONTENT_TYPE_STRING = 0;
+    const CONTENT_TYPE_STRING = 1;
     const CONTENT_TYPE_PNG = 4;
     const CONTENT_TYPE_JPEG = 2;
     const CONTENT_TYPE_MULTI_VALUE = 6;