* this fix contains noninteractive installation fixes for debian based system
* this fixes issues with the installation of unauthenticated packages under debian on EC2
* this fixes issues with the installation of MySQL under debian on EC2
* this fixes issues with the installation of PHP5 (and everything else relying on libc6) under debian on EC2
* included the debian supression mechanism for interative configuration
* fixed a bug with the common commands instal method which I caused; the export should be done inside the apt-get check
* excluded the localhost test on the mysqlliveec2 test since it is already tested
removed some debug echo's
fix for nginx on osx
aled's comments addressed
Merge pull request #530 from pveentjer/debian-noninteractive-fixes

debian ec2 fixes (mysql + php5)
Merge pull request #532 from andreaturli/nginx

fix for nginx on osx