Move Tests outside php-amqplib/PhpAmqpLib/

This should fix Issue #130
Fix for case insensitive File-System

This is a followup for 5bdbfd45addd832aa46a01427b04467d10b6e114
Merge pull request #185 from hexa2k9/issue-130

Move Tests outside php-amqplib/PhpAmqpLib/
add PHP CodeSniffer & PSR2 Standards-Test