--which_test for AFL at least seems to not work

[agroce]

Doesn't seem to create the right call to --input_which_test in the command line:

deepstate-afl ./runlen.afl --fuzzer_out --fuzzer_args d --output_test_dir afl_fuzzing --which_test Runlength_EncodeDecode
INFO:deepstate:Setting log level from DEEPSTATE_LOG: 2
INFO:deepstate.core.base:Setting log level from --min_log_level: 2
INFO:deepstate.core.fuzz:Calling pre_exec before fuzzing
INFO:deepstate.executors.fuzz.afl:Resuming fuzzing using seeds from afl_fuzzing/the_fuzzer/queue (skipping --input_seeds option).
INFO:deepstate.core.fuzz:Executing command `['/home/user/deps/afl/afl-fuzz', '-o', 'afl_fuzzing', '-m', '50', '-S', 'the_fuzzer', '-i', '-', '--', '/home/user/deepstate/examples/runlen.afl', '--input_stdin', '--abort_on_fail', '--no_fork', '--min_log_level', '2']`

Also, should be --input_which_test for consistency, I think.