Merge branch 'update-lwtnn-2.9' into '1.0'

Updating ltwnn to version 2.9 in 1.0

See merge request !499

External/lwtnn/CMakeLists.txt

@@ -30,8 +30,8 @@ set( _buildDir ${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/lwtnnBuild )
 ExternalProject_Add( lwtnn
    PREFIX ${CMAKE_BINARY_DIR}
    INSTALL_DIR ${CMAKE_BINARY_DIR}/${ATLAS_PLATFORM}
-   URL http://cern.ch/atlas-software-dist-eos/externals/lwtnn/v2.8.1.tar.gz
-   URL_MD5 a72f30dcb08acc5f9f02b0494744b856
+   URL http://cern.ch/atlas-software-dist-eos/externals/lwtnn/v2.9.tar.gz
+   URL_MD5 208f81a46f8b43ebbf93d14fd8f1634d
    CMAKE_CACHE_ARGS
    -DCMAKE_INSTALL_PREFIX:PATH=${_buildDir}
    -DEIGEN3_INCLUDE_DIR:PATH=${EIGEN_INCLUDE_DIRS}