Use PG 9.1 for Travis tests
Use PG 9.1 for Travis tests

The "postgresql" package now points to "postgresql-9.4" but we install
postgresql-9.1-ip4r which obviously isn't compatible with 9.4. Solution
is to hard code install of postgres 9.1 instead!

garberg/NIPAP,ettrig/NIPAP,plajjan/NIPAP,fredsod/NIPAP,ettrig/NIPAP,SoundGoof/NIPAP,garberg/NIPAP,ettrig/NIPAP,bbaja42/NIPAP,ettrig/NIPAP,plajjan/NIPAP,garberg/NIPAP,plajjan/NIPAP,bbaja42/NIPAP,fredsod/NIPAP,SoundGoof/NIPAP,SpriteLink/NIPAP,fredsod/NIPAP,garberg/NIPAP,bbaja42/NIPAP,SpriteLink/NIPAP,SpriteLink/NIPAP,SpriteLink/NIPAP,garberg/NIPAP,SoundGoof/NIPAP,bbaja42/NIPAP,bbaja42/NIPAP,fredsod/NIPAP,plajjan/NIPAP,plajjan/NIPAP,SpriteLink/NIPAP,ettrig/NIPAP,SoundGoof/NIPAP,plajjan/NIPAP,fredsod/NIPAP,garberg/NIPAP,bbaja42/NIPAP,fredsod/NIPAP,SpriteLink/NIPAP,SoundGoof/NIPAP,ettrig/NIPAP,SoundGoof/NIPAP