Analyzer test was missing imports.
IPFIX templates with 16 bytes fields were processed extra, since struct
does not natively support conversion to int. The new implementation
still handles it extra, but uses struct's "s" unpack format descriptor
now.
The tests are now located in tests/. They are also split into multiple
files, beginning with test_netflow and test_analyzer. The tests for
IPFIX will be added to test_ipfix.