Add basic test infrastructure

[simo5]

This runs in make check so hopefully it will work as CI via travis

First test is for SASL/GSSAPI

Fixes #595

[simo5]

@quanah can you take a look at this ?

[iboukris]

Cool!

[quanah]

@simo5 Yes, will look in more detail shortly. :)

[simo5]

@quanah if this works, we can ask #586 to add a test to validate it works, and I can start adding more tests for other parts of SASL as well

[aiobofh]

@simo5 awsome work! I'll try to find some time somewhere to write some tests on credential delegation and maybe loading of specified store. Can't give a deadline - Work is taking a bit more time now when the world is what it is. But hopefully soon...

[quanah]

@simo5 For the 2.1 release branch, is this OK to add as-is, or do we need to tweak it?

[simo5]

@quanah With the caveat that tests are not run on macosx (because I do not have one and travis is too slow to do iterative experiments) I do not see a problem having them in the release.
It does add a dependency in the make check step though.
If that is a problem we can add a make tests target instead so that ppl that do not want to have that dependency in the way can avoid it.

[simo5]

@quanah aaand I just realized some files have this as the header:
/* TBD, add (C) */
I can follow up with a PR that fixes that, what License is acceptable? Should I add CMUs one ?

[quanah]

@simo5 I would ask on the cyrus devel list for the license question