Make logic node conversion more stringent when reading database.
Make logic node conversion more stringent when reading database.

Bugfix for misconversion of 'OR' group in updated cyclic ether formation family.

faribas/RMG-Py,enochd/RMG-Py,chatelak/RMG-Py,KEHANG/RMG-Py,faribas/RMG-Py,pierrelb/RMG-Py,comocheng/RMG-Py,nickvandewiele/RMG-Py,enochd/RMG-Py,KEHANG/RMG-Py,nyee/RMG-Py,comocheng/RMG-Py,nyee/RMG-Py,chatelak/RMG-Py,nickvandewiele/RMG-Py,pierrelb/RMG-Py