Allow selecting a specific LimeSDR device by setting dev-args in the
config file. Split up the given dev-args address by comma and select
the device where all substrings can be found.
I could not test this with real hardware, but I have added a test case
to make sure this works as expected.
Test files are moved from CommonLibs/ to tests/CommonLibs/.
Some tests are disabled in autotest because they generate timedate
related output which cannot exactly match against expected output.