[WIP] Tests for tracker.tracking_uuids

[radujipa]

This adds tests for the new tracking_uuids module.

It is currently a work in progress because of the Remove code execution at import time commit, but the tests are done.

For now, I've been running it like this:

radu@Radus-MacBook-Pro:~/Kano/kano-profile$ PYTHONPATH=../kano-toolset:../kano-i18n:PYTHONPATH pytest -ra tests/profile/tracking/test_tracking_uuids.py
============================ test session starts ============================
platform darwin -- Python 2.7.10, pytest-3.4.0, py-1.5.2, pluggy-0.6.0
rootdir: /Users/radu/Kano/kano-profile, inifile: pytest.ini
plugins: pyfakefs-3.3, cov-2.5.1
collected 401 items

tests/profile/tracking/test_tracking_uuids.py ....................... [ 5%]
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======================== 401 passed in 3.57 seconds =========================