Add check on user-specified bounding boxes for volume calculations
Add check on user-specified bounding boxes for volume calculations

wbinventor/openmc,shikhar413/openmc,mit-crpg/openmc,shikhar413/openmc,johnnyliu27/openmc,samuelshaner/openmc,wbinventor/openmc,liangjg/openmc,walshjon/openmc,walshjon/openmc,amandalund/openmc,smharper/openmc,amandalund/openmc,mit-crpg/openmc,samuelshaner/openmc,liangjg/openmc,walshjon/openmc,amandalund/openmc,wbinventor/openmc,samuelshaner/openmc,bhermanmit/openmc,paulromano/openmc,liangjg/openmc,johnnyliu27/openmc,johnnyliu27/openmc,bhermanmit/openmc,johnnyliu27/openmc,paulromano/openmc,shikhar413/openmc,smharper/openmc,liangjg/openmc,smharper/openmc,mit-crpg/openmc,amandalund/openmc,wbinventor/openmc,walshjon/openmc,samuelshaner/openmc,paulromano/openmc,smharper/openmc,paulromano/openmc,mit-crpg/openmc,shikhar413/openmc