Added support for debugging tests

[itsgoingd]

This PR adds an ability to collect ran tests as "requests" to be shown in the Clockwork app. Every test ran, eg. RssEntryDecoratorTest::content_can_be_parsed, is shown as a request.

These requests have all the metadata, like timeline, executed database queries, log messages, etc. collected during the test run and test-specific metadata like test name, status (passed, failed, skipped..), list of asserts with arguments and failure message.

Included is a Laravel integration that can be enabled by adding a Clockwork testing trait to tests/TestCase.php:

use Clockwork\Support\Laravel\Tests\UsesClockwork;

abstract class TestCase extends BaseTestCase
{
    use CreatesApplication, DatabaseMigrations, UsesClockwork;
}

(see app PR for screenshots)

• added "type" to requests (currently "request" or "test") and test-specific metadata (testName, testStatus, testStatusMessage, testAsserts)
• added Clockwork::resolveTest method for resolving current request as "test" request with test-specific metadata
• added support for collecting test runs in Laravel integration (w/ default PHPUnit setup)
• app PR - Added support for debugging tests underground-works/clockwork-app#23