PROV-928: Move /tests from /support/tests and update refs.
PROV-928: Add .htaccess for top-level tests dir
Add setup-tests.php and defined() checks in setup.php

+ Create setup-tests.php which defines test-specific configuration, then
  includes the root level setup.php.
+ Wrap each define() in setup.php and setup-tests.php in defined() checks.
+ Change bootstrap setting in phpunit.xml.
Merge pull request #111 from leftclickben/PROV-928

PROV-928 Move tests/ to top-level of directory structure