[tests] Improve the basic framework of our test suite.

We now have a base test case class for Predis (namely PredisTestCase)
grouping various commonly used utility methods shared by all of the
tests in the suite, greatly improving reusability.

tests/Predis/Configuration/ConnectionFactoryOptionTest.php

@@ -12,15 +12,14 @@
 namespace Predis\Configuration;
 
 use InvalidArgumentException;
-use PHPUnit_Framework_TestCase as StandardTestCase;
 use stdClass;
-
+use PredisTestCase;
 use Predis\Connection\ConnectionFactory;
 
 /**
  *
  */
-class ConnectionFactoryOptionTest extends StandardTestCase
+class ConnectionFactoryOptionTest extends PredisTestCase
 {
     /**
      * @group disconnected