gnattest: aunit not installed

[robinmoss@e2eservices.co.uk]

Hello,

I've been fighting for awhile with gnattest, and trying to get it to work.

I downloaded `gnat-gpl-2017-x86_64-linux-bin` and ran `doinstall.sh`, and it all seems to work I have my project that uses AWS and JSON building via gprbuild fine.

I did download and compile gnatcol as well to get JSON working.

However when ever I try and run gnattest, even from the `share/examples/aunit` it always fails with the following output;

```
/usr/gnat/share/examples/gnattest/simple$ gnattest simple.gpr
default.gpr:1:06: unknown project file: "aunit"

gnattest: aunit not installed
```

The above also occurs if i try using GPS

I cannot find any advice online about this, anyone got any ideas what the problem is?

Using Ubuntu 16.04 LTS

Thanks,
Robin