fix(initPhpLogging): Moving fetch settings to before settings check.

There is the bug that you cannot disable PhpLogging since the settings
property is not set until fetchSettings() is called. So I reordered.

Author: spenserhale

src/Plugin.php

@@ -265,13 +265,13 @@ public static function buildIncludedErrno($cutoff)
 
     public function initPhpLogging()
     {
+        $this->fetchSettings();
+
         // Return if logging is not enabled
         if ( $this->settings['php_logging_enabled'] === 0 ) {
             return;
         }
 
-        $this->fetchSettings();
-        
         // installs global error and exception handlers
         try {