adding auth interop tests for C# to grpc_docker.sh

tools/gce_setup/grpc_docker.sh

@@ -1401,6 +1401,38 @@ grpc_cloud_prod_gen_csharp_mono_cmd() {
   echo $the_cmd
 }
 
+# constructs the full dockerized csharp-mono service_account auth interop test cmd.
+#
+# call-seq:
+#   flags= .... # generic flags to include the command
+#   cmd=$($grpc_gen_test_cmd $flags)
+grpc_cloud_prod_auth_service_account_creds_gen_csharp_mono_cmd() {
+  local workdir_flag="-w /var/local/git/grpc/src/csharp/Grpc.IntegrationTesting.Client/bin/Debug"
+  local env_flag="-e SSL_CERT_FILE=/cacerts/roots.pem "
+  env_flag+="-e GOOGLE_APPLICATION_CREDENTIALS=/service_account/stubbyCloudTestingTest-7dd63462c60c.json "
+  local cmd_prefix="sudo docker run $workdir_flag $env_flag grpc/csharp_mono";
+  local test_script="mono Grpc.IntegrationTesting.Client.exe --use_tls=true";
+  local gfe_flags=$(_grpc_prod_gfe_flags);
+  local the_cmd="$cmd_prefix $test_script $gfe_flags $@";
+  echo $the_cmd
+}
+
+# constructs the full dockerized csharp-mono gce auth interop test cmd.
+#
+# call-seq:
+#   flags= .... # generic flags to include the command
+#   cmd=$($grpc_gen_test_cmd $flags)
+grpc_cloud_prod_auth_compute_engine_creds_gen_csharp_mono_cmd() {
+  local workdir_flag="-w /var/local/git/grpc/src/csharp/Grpc.IntegrationTesting.Client/bin/Debug"
+  local env_flag="-e SSL_CERT_FILE=/cacerts/roots.pem "
+  local cmd_prefix="sudo docker run $workdir_flag $env_flag grpc/csharp_mono";
+  local test_script="mono Grpc.IntegrationTesting.Client.exe --use_tls=true";
+  local gfe_flags=$(_grpc_prod_gfe_flags)
+  local added_gfe_flags=$(_grpc_gce_test_flags)
+  local the_cmd="$cmd_prefix $test_script $gfe_flags $added_gfe_flags $@";
+  echo $the_cmd
+}
+
 # outputs the flags passed to gfe tests
 _grpc_prod_gfe_flags() {
   echo " --server_port=443 --server_host=grpc-test.sandbox.google.com --server_host_override=grpc-test.sandbox.google.com"