ULib - This patch adds PostGres test alongside with minor fix

This patch adds PostGres test database alongside with minor fix...

All tests are passing as per [my Travis-CI build log](https://travis-ci.org/stefanocasazza/FrameworkBenchmarks/builds/45049685)
Hi, 
my need is to use a version of g++ equal to or greater than 4.8, I do not know other ways to satisfy it, but I'm open to suggestions...