Fix integration test

Author: amrit110

.github/workflows/integration_tests.yml

@@ -42,6 +42,7 @@ jobs:
         run: |
           export PATH=/opt/openmpi-4.1.5/bin:$PATH
           export LD_LIBRARY_PATH=/opt/openmpi-4.1.5/lib:$LD_LIBRARY_PATH
+          export MPICC=/opt/openmpi-4.1.5/bin/mpicc:$MPICC
           ompi_info
       - uses: actions/checkout@v3
       - name: Install poetry
@@ -54,7 +55,6 @@ jobs:
           poetry env use '3.10'
           source $(poetry env info --path)/bin/activate
           poetry install --with test,dev --all-extras
-          env MPICC=/opt/openmpi-4.1.5/bin/mpicc python -m pip install git+https://github.com/mpi4py/mpi4py
           coverage run -m pytest -m integration_test && coverage xml && coverage report -m
       - name: Upload coverage to Codecov
         uses: Wandalen/wretry.action@v1.0.36