[openforcefield] use conda-forge ambertools instead of ambermini; remove parmed (which is included with ambertools) fixes https://github.com/openforcefield/openforcefield/issues/487
[openforcefield] use conda-forge ambertools instead of ambermini; remove parmed (which is included with ambertools)
fixes https://github.com/openforcefield/openforcefield/issues/487

omnia-md/conda-recipes,omnia-md/conda-recipes,omnia-md/conda-recipes