Get rid of finally statement from run_in_memory function
Get rid of finally statement from run_in_memory function

smharper/openmc,amandalund/openmc,shikhar413/openmc,smharper/openmc,shikhar413/openmc,amandalund/openmc,paulromano/openmc,liangjg/openmc,paulromano/openmc,liangjg/openmc,mit-crpg/openmc,liangjg/openmc,walshjon/openmc,mit-crpg/openmc,walshjon/openmc,walshjon/openmc,mit-crpg/openmc,walshjon/openmc,amandalund/openmc,mit-crpg/openmc,paulromano/openmc,paulromano/openmc,liangjg/openmc,amandalund/openmc,smharper/openmc,shikhar413/openmc,smharper/openmc,shikhar413/openmc