Added unit tests under Zenodotus repository

[XuefengHuang]

This PR adds two unit tests.
ut_zenodotus_queryzenodotus.py tests the advertise services (i.e. Zenodotus' "database") behave.
ut_zenodotus_checkadvertisedvalues.py tests what happend if we advertise "impossible" (i.e. non-IPv4) values under a Zenodotus name

This is my test result on Mac OS X 10.10.2.

Xuefengs-MacBook-Pro:desktop Xuefeng$ git clone https://github.com/XuefengHuang/zenodotus -b unittest
Cloning into 'zenodotus'...
remote: Counting objects: 93, done.
remote: Compressing objects: 100% (59/59), done.
remote: Total 93 (delta 44), reused 72 (delta 34)
Unpacking objects: 100% (93/93), done.
Checking connectivity... done.
Xuefengs-MacBook-Pro:desktop Xuefeng$ cd zenodotus/scripts
Xuefengs-MacBook-Pro:scripts Xuefeng$ python initialize.py
Checking out repo from https://github.com/SeattleTestbed/seattlelib_v2 ...
Done!
Checking out repo from https://github.com/SeattleTestbed/repy_v2 ...
Done!
Checking out repo from https://github.com/SeattleTestbed/nodemanager ...
Done!
Checking out repo from https://github.com/SeattleTestbed/portability ...
Done!
Checking out repo from https://github.com/SeattleTestbed/common ...
Done!
Checking out repo from https://github.com/SeattleTestbed/utf ...
Done!
Xuefengs-MacBook-Pro:scripts Xuefeng$ python build.py -t
Building into /Users/huangxuefeng/Desktop/zenodotus/RUNNABLE
Done building!
Xuefengs-MacBook-Pro:scripts Xuefeng$ cd ../runnable
Xuefengs-MacBook-Pro:runnable Xuefeng$ python utf.py -a
Testing module: zenodotus
    Running: ut_zenodotus_checkadvertisedvalues.py              [ PASS ]
    Running: ut_zenodotus_queryzenodotus.py                     [ PASS ]