More unit test fixes
More unit test fixes

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