Fix relative paths of postgis extension

[dkniffin]

I worked with @prawl to find the solution for #251. Here's a PR of that change.

[keeganbrown]

+1

[gclough]

Do we need to use the "../" anyway? I have modified #310 to remove the prefix altogether, as Ansible always assumes "./vars", so in it's current state it does "./vars/../vars", which seems a bit odd.

The new docker tests have been updated to install and verify it's working, so can you check my work to make sure it's OK for you? It's not merged into the master branch yet...

[gclough]

Actually by using "{{ ansible_distribution_release }}", it's never going to load anything, because the files in vars are based on the {{ ansible_os_family }} variable.

... plus, at this point in the code it doesn't need to, as the variables have already been loaded in earlier, right?

[gclough]

FYI... this is the output on my server. "Core"

TASK [postgresql : debug] ************************************************************************
ok: [192.168.45.84] => {
    "ansible_distribution_release": "Core"
}

[aoyawale]

@gclough so does your PR fix this issue and we don't need this one ?

[gclough]

@jlozadad, I'm pretty sure it does as all Travis tests pass... and I've included a test install of PostGIS into the tests. I've just squashed all of the commits, and basically I've removed the variables section altogether... because these are included in the main.yml file, so they don't need including again in here. Right?

[aoyawale]

right. so ill give it a few days then if nobody has any concern then we can close this one.