fix tests for smirky sampler and initiate sampler with SMIRKS intead of chemical environments
fix tests for smirky sampler and initiate sampler with SMIRKS intead of chemical environments

open-forcefield-group/openforcefield,openforcefield/openff-toolkit,open-forcefield-group/openforcefield,openforcefield/openff-toolkit,open-forcefield-group/openforcefield