Fixed help text in DeviceDefinitionsMigrator.
Fixed help text in DeviceDefinitionsMigrator.

git-tfs-id: [https://tfs.codeplex.com/tfs/TFS07]$/openXDA/Main;C91197

GridProtectionAlliance/openXDA,GridProtectionAlliance/openXDA,GridProtectionAlliance/openXDA,GridProtectionAlliance/openXDA