Redis Cache Adapter Config - setLibOptions is broken

[tom-pryor]

When using the Redis cache adapter it is not possible to use the setLibOptions function in the config. For example:

use Zend\Cache\Storage\Adapter\RedisOptions;
use Zend\Cache\Storage\Adapter\Redis;

$redis_options = new RedisOptions();

$redis_options->setLibOptions(array(
       \Redis::OPT_SERIALIZER => \Redis::SERIALIZER_PHP
));

$redis_cache = new Redis($redis_options);

As soon as you attempt to use the cache you'll get:

Fatal error: Uncaught exception 'RedisException' with message 'Redis server went away' in /mnt/project/vendor/zendframework/zendframework/library/Zend/Cache/Storage/Adapter/RedisResourceManager.php on line 70

This is because you can't call setOption until you've connected to the Redis server.

[tom-pryor]

Submitted pull request #4577 which solves this by moving the setOption calls to after the connection to the Redis server is established.