avoid PHP bug: use Config\Services

[takekoshinet]

#373

It's temporary expedient. This avoids fatal error, but there is no change in use arises error...

[coveralls]

Coverage remained the same at 62.233% when pulling 308d993 on noldor:fix/use-services-error into c8d5436 on bcit-ci:develop.

[takekoshinet]

$ php -v
PHP 7.0.12 (cli) (built: Jan 18 2017 23:56:04) ( NTS )
Copyright (c) 1997-2016 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
    with Zend OPcache v7.0.12, Copyright (c) 1999-2016, by Zend Technologies
    with Xdebug v2.5.0, Copyright (c) 2002-2016, by Derick Rethans

$ phpunit 

==== Redirecting to composer installed version in vendor/phpunit ====

PHPUnit 5.3.5 by Sebastian Bergmann and contributors.

.............................................................   61 / 1222 (  4%)
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.............................................................  305 / 1222 ( 24%)
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............................................................. 1098 / 1222 ( 89%)
............................................................. 1159 / 1222 ( 94%)
............................................................. 1220 / 1222 ( 99%)
..                                                            1222 / 1222 (100%)

Time: 1.26 minutes, Memory: 42.00MB

OK (1222 tests, 1938 assertions)

Generating code coverage report in Clover XML format ... done