Docker: Give i-Pi a bit more time to startup

tools/docker/scripts/test_i-pi.sh

@@ -26,22 +26,25 @@ echo -e "\n========== Running i-Pi Tests =========="
 
 cd  /opt/i-pi/examples/cp2k/nvt-cl
 set +e # disable error trapping for remainder of script
-ulimit -t 300  # abort after 5 minutes
+
+TIMEOUT_SEC="300"
+ulimit -t ${TIMEOUT_SEC}  # Limit cpu time.
 
 # launch cp2k
 (
   mkdir -p run_1
   cd run_1
   echo 42 > cp2k_exit_code
-  sleep 2 # give i-pi some time to startup
+  sleep 10 # give i-pi some time to startup
   export OMP_NUM_THREADS=2
   mpiexec -np 2 /workspace/cp2k/exe/local/cp2k.pdbg ../in.cp2k
   echo $? > cp2k_exit_code
 ) &
 
 # launch i-pi
 sed -i "s/total_steps>1000/total_steps>10/" input.xml
-/usr/local/bin/i-pi input.xml
+# Limit walltime too, because waiting for a connection consumes no cpu time.
+timeout ${TIMEOUT_SEC} /usr/local/bin/i-pi input.xml
 IPI_EXIT_CODE=$?
 
 wait # for cp2k to shutdown