Fix HOOMD issues with GAFF ForceField #1273

Job	Run time
Bleeding Edge mosdef Tests for GMSO	14m 7s
GMSO Tests (macOS-latest, 3.8, 2)	46m 33s
GMSO Tests (macOS-latest, 3.9, 2)	46m 4s
GMSO Tests (macOS-latest, 3.10, 2)	47m 52s
GMSO Tests (macOS-latest, 3.11, 2)	44m 12s
GMSO Tests (ubuntu-latest, 3.8, 2)	24m 47s
GMSO Tests (ubuntu-latest, 3.9, 2)	27m 25s
GMSO Tests (ubuntu-latest, 3.10, 2)	33m 50s
GMSO Tests (ubuntu-latest, 3.11, 2)	28m 5s
Build Docker Image	0s
	5h 12m 55s

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