Move testing namespace.

Signed-off-by: crynobone <crynobone@gmail.com>

Conflicts:
	tests/Orchestra/Foundation/ServiceProviderTest.php
Update phpunit.xml

Signed-off-by: crynobone <crynobone@gmail.com>
Completely remove service namespace.

Signed-off-by: crynobone <crynobone@gmail.com>

Conflicts:
	src/Orchestra/Foundation/Application.php