Added Unittests for cache

fixed Lock & Cache bugs

tests/src/Core/Lock/ArrayCacheLockDriverTest.php

@@ -24,4 +24,10 @@ class ArrayCacheLockDriverTest extends LockTest
 		$this->cache->clear();
 		parent::tearDown();
 	}
+
+	public function testLockTTL()
+	{
+		// ArrayCache doesn't support TTL
+		return true;
+	}
 }