Make changes to phpbb3 to support individual file unit testing with HHVM

Summary:

Test Plan:

Reviewers:

CC:

Task ID: #

Blame Rev:
Merge branch 'make_work_with_hhvm_parallel_testing' of github.com:JoelMarcey/phpbb into make_work_with_hhvm_parallel_testing

Conflicts:
	tests/class_loader/class_loader_test.php
	tests/functions_acp/build_select_test.php
	tests/functions_acp/h_radio_test.php
	tests/functions_acp/validate_config_vars_test.php
	tests/functions_acp/validate_range_test.php