Add work in progress unit test for converting old adjlists with complex spin states.
Add work in progress unit test for converting old adjlists with complex spin states.

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