[TK] fall back on default values even with an empty config file
fix _round_end_games bug
more tests
Merge branch 'ozon' into release-1.10
[TESTS] skip sftpytail plugin test if the paramiko python module is not available
[CORE] onLoadConfig hook is now called by the parser instead of at plugin instantiation
add paramiko to the pip-requires.txt file and configure TravisCI to use that file