Fixing python version

Jenkinsfile

@@ -127,7 +127,7 @@ pipeline
                                 unstash name: 'ubuntu_examples'
                                 sh 'tar -xvzf Dist/CARLA*.tar.gz -C Dist/'
                                 sh 'DISPLAY= ./Dist/CarlaUE4.sh -opengl --carla-rpc-port=3654 --carla-streaming-port=0 -nosound > CarlaUE4.log &'
-                                sh 'make smoke_tests ARGS="--xml"'
+                                sh 'make smoke_tests ARGS="--xml --python-version=3.7"'
                                 sh 'make run-examples ARGS="localhost 3654"'
                             }
                             post

Util/BuildTools/Check.sh

@@ -197,7 +197,7 @@ popd >/dev/null
 if ${SMOKE_TESTS} ; then
   pushd "${CARLA_PYTHONAPI_ROOT_FOLDER}/util" >/dev/null
     log "Checking connection with the simulator."
-    python${PY_VERSION} test_connection.py -p 3654 --timeout=60.0
+    /usr/bin/env python${PY_VERSION} test_connection.py -p 3654 --timeout=60.0
   popd >/dev/null
 fi