Reorganize imports so tests work individually

tests/all_tests.py

tests/common_tests.py

tests/config_tests.py

tests/encoding_tests.py

tests/feedparser_tests.py

tests/issue_submitter_tests.py

tests/name_parser_tests.py

tests/pp_tests.py

tests/scene_helpers_tests.py

tests/snatch_tests.py

tests/ssl_sni_tests.py

tests/test_lib.py

tests/torrent_tests.py

tests/tv_tests.py

tests/xem_tests.py