ZF2 ModuleEvent listener that prioritises `ViewJsonStrategy` over `ZfcTwigViewStrategy` in order to properly render a JsonModel.

Module.php

<?php

namespace Application;

use Zend\ModuleManager\ModuleEvent;
use Zend\ModuleManager\ModuleManager;

/**
 * Class Module
 * @package Application
 */
class Module
{
    /**
     * @param ModuleManager $moduleManager
     */
    public function init(ModuleManager $moduleManager)
    {
        $events = $moduleManager->getEventManager();
        $events->attach(ModuleEvent::EVENT_MERGE_CONFIG, [$this, 'onMergeConfig']);
    }

    /**
     * @param ModuleEvent $e
     */
    public function onMergeConfig(ModuleEvent $e)
    {
        $configListener = $e->getConfigListener();
        $config = $configListener->getMergedConfig(false);

        // If both ZfcTwigViewStrategy and ViewJsonStrategy registered, prioritise ViewJsonStrategy, this fixes an issue
        // with the zfctwig module where it was trying to load layouts for JsonModel responses.
        if (isset($config['view_manager']['strategies'])
            && false !== array_search('ViewJsonStrategy', $config['view_manager']['strategies'])
            && false !== ($zfcKey = array_search('ZfcTwigViewStrategy', $config['view_manager']['strategies']))
        ) {
            unset($config['view_manager']['strategies'][$zfcKey]);
            array_push($config['view_manager']['strategies'], 'ZfcTwigViewStrategy');

            $configListener->setMergedConfig($config);
        }
    }

Code originally taken from an example in the Zend documentation:
http://framework.zend.com/manual/current/en/tutorials/config.advanced.html#manipulating-merged-configuration