Adding timeout for each test run so that failed tests do not block the running...

Adding timeout for each test run so that failed tests do not block the running of the rest of the tests.

tools/gce_setup/interop_test_runner.sh

 #!/bin/bash
+thisfile=$(readlink -ne "${BASH_SOURCE[0]}")
+
+run_test() {
+  local test_case=$1
+  shift
+  local client=$1
+  shift 
+  local server=$1
+  if grpc_interop_test $test_case grpc-docker-testclients $client grpc-docker-server $server
+  then
+    echo "$test_case $client $server passed" >> /tmp/interop_result.txt
+  else
+    echo "$test_case $client $server failed" >> /tmp/interop_result.txt
+  fi
+}
+
+time_out() {
+  local test_case=$1
+  shift
+  local client=$1
+  shift
+  local server=$1
+  if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
+    if ! timeout 20s bash -l -c "source $thisfile && run_test $test_case $client $server"
+    then
+      echo "$test_case $client $server timed out" >> /tmp/interop_result.txt
+    fi
+  fi
+}
 
 main() {
   source grpc_docker.sh
@@ -11,17 +40,14 @@ main() {
     do
       for server in "${servers[@]}"
       do
-        if grpc_interop_test $test_case grpc-docker-testclients $client grpc-docker-server $server
-        then
-          echo "$test_case $client $server passed" >> /tmp/interop_result.txt
-        else
-          echo "$test_case $client $server failed" >> /tmp/interop_result.txt
-        fi
+        time_out $test_case $client $server
       done
     done
   done
-  gsutil cp /tmp/interop_result.txt gs://stoked-keyword-656-output/interop_result.txt
-  rm /tmp/interop_result.txt
+  if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
+    gsutil cp /tmp/interop_result.txt gs://stoked-keyword-656-output/interop_result.txt
+    rm /tmp/interop_result.txt
+  fi
 }
 
 set -x