Removed redundant calls to $this->template in TraceableTwigTemplate

[OhMyMndy]

Removed redundant calls (they are catched by __call) to $this->template in TraceableTwigTemplate to remove the following incompatibility warning:

Declaration of DebugBar\Bridge\Twig\TraceableTwigTemplate::hasBlock() should be compatible with Twig_Template::hasBlock($name, array $context = NULL, array $blocks = Array)

[barryvdh]

Doesn't this fail the interface implementation?

[OhMyMndy]

Fortunately not, see the interface for 1.x Version 2.x does not have that interface and has an abstract class instead

[OhMyMndy]

Can someone rerun the checks, because the checks failed on PHP 5.3 and PHP 5.4 which have been removed from Travis recently.