Fix missing imports

Fix compilation errors in nightly built against the latest LCG development version regarding missing imports (std::set)

Tested with:

source /cvmfs/atlas.cern.ch/repo/sw/tdaq/tools/cmake_tdaq/bin/cm_setup.sh dev4
rm -rf x86_64-centos7-gcc11-opt/
cmake_config
cd x86_64-centos7-gcc11-opt/
make
make install

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