Install pytest in fedora ci script

Author: tomchapman

.ci_fedora.sh

@@ -37,6 +37,7 @@ test . != ".$1" && mpi="$1" || mpi=openmpi
     cp -a /tmp/BOUT-dev /home/test/
     . /etc/profile.d/modules.sh
     module load mpi/${1}-x86_64
+    sudo dnf install -y python3-pytest
     # OpenMPI Oversubscription Overrides
     export OMPI_MCA_rmaps_base_oversubscribe=1
     export OMPI_MCA_hwloc_base_binding_policy=none