Fixed issue with discrepancy in indexing of y-dimension in lattice universes and offsets
Fixed issue with discrepancy in indexing of y-dimension in lattice universes and offsets

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