Add suppor for hscan do no more errors like Parameter 2 to Redis::hs… (…

…blablacar#7)

* Add suppor for hscan do no more errors like  Parameter 2 to Redis::hscan() expected to be a reference, value given

* TestClient updated

One transaction to acquire lock

Merge pull request blablacar#5 from glutamatt/fix-Lock-Expire

Fix missing lock ttl

Merge pull request blablacar#4 from cvasseur/master

Fix lock expire

Merge pull request blablacar#3 from cvasseur/master

Fix session handler lock

Add more methods for testing purpose

Fix SessionHandler

Move TestClient to make it available outside the lib

Complete / clean Test/Client

Remove support for php 5.3