added nightly test script for CDash integration
added nightly test script for CDash integration

samuelshaner/openmc,paulromano/openmc,johnnyliu27/openmc,nhorelik/openmc,amandalund/openmc,wbinventor/openmc,shenqicang/openmc,mjlong/openmc,kellyrowland/openmc,bhermanmit/openmc,johnnyliu27/openmc,amandalund/openmc,shikhar413/openmc,sxds/opemmc,smharper/openmc,liangjg/openmc,amandalund/openmc,mit-crpg/openmc,mit-crpg/openmc,samuelshaner/openmc,shenqicang/openmc,paulromano/openmc,walshjon/openmc,liangjg/openmc,nhorelik/openmc,johnnyliu27/openmc,paulromano/openmc,mjlong/openmc,smharper/openmc,mit-crpg/openmc,wbinventor/openmc,samuelshaner/openmc,lilulu/openmc,shikhar413/openmc,liangjg/openmc,wbinventor/openmc,lilulu/openmc,shikhar413/openmc,amandalund/openmc,mit-crpg/openmc,walshjon/openmc,smharper/openmc,smharper/openmc,bhermanmit/openmc,samuelshaner/openmc,walshjon/openmc,sxds/opemmc,johnnyliu27/openmc,liangjg/openmc,kellyrowland/openmc,wbinventor/openmc,walshjon/openmc,lilulu/openmc,shikhar413/openmc,paulromano/openmc