Handle exceptions correctly when using Guzzle 5.
Handle exceptions correctly when using Guzzle 5.

bshaffer/google-api-php-client,eRadical/google-api-php-client,Jyo1/google_api_php,michabbb-backup/google-api-php-client,googleapis/google-api-php-client,zahoorkhan/google-api-php-client,michabbb-backup/google-api-php-client