Display postgres version in .travis.yml
Display postgres version in .travis.yml

This will make debugging a bit easier, when a problem is due to
version-specific differences (like the lock_timeout) issue.

CCI-MOC/haas,henn/hil_sahil,henn/hil,kylehogan/haas,kylehogan/hil,henn/haas,meng-sun/hil,kylehogan/hil,henn/hil,SahilTikale/haas,meng-sun/hil,henn/hil_sahil