fixed MySqlLiveEc2Test

- fixes #613

The Ec2LiveTests will now test

*  CentOS_5_6
*  CentOS_6_3
*  Ubuntu_10_0
*  Debian_6.0.7
*  Red_Hat_Enterprise_Linux_6.3
*  Ubuntu_12_0

we agreed with @aledsage to remove Debian_5 test.