Setting DAGMC_ROOT instead of LD_LIBRARY_PATH in travis YAML file.
Setting DAGMC_ROOT instead of LD_LIBRARY_PATH in travis YAML file.

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