When swarming, got ERROR 1698 (28000): Access denied for user 'root'@'localhost' mysql

@rhyolight, NOTE: I needed to set the environment variable NTA_CONF_PATH, because running swarming tests

./scripts/run_nupic_tests.py -w

was resulting in the ERROR OperationalError: (2003, “Can’t connect to MySQL server on ‘localhost’ ((1251, u’Client does not support authentication protocol requested by server; consider upgrading MySQL client’))”).

However, hotgym.py example worked without setting this variable.

So, it appears to be a bug when running ./scripts/run_nupic_tests.py -w.

If I recall correctly, I installed nupic from source via python setup.py develop --user (after compiling and installing nupic.bindings from source)