removed line to capitalize columns when exporting xs data
removed line to capitalize columns when exporting xs data

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