add load testing script

apps/cli/utilities/infrastructure_testing_scripts/load_test.sh

+#!/usr/bin/env bash
+
+set -o errexit -o nounset
+
+function usage {
+    echo "Usage: load_test [test_count]
+
+    This script load tests the workspaces capability service by creating and submitting
+    the specified number of null requests to the system under testing.
+    Running this on the production system is not recommended.
+    "
+}
+
+test_count=$1
+
+CAPABILITY_SERVICE=$(capo -q edu.nrao.workspaces.CapabilitySettings.externalServiceUrl)
+
+parameters="{\"arguments\": \"-g\"}"
+
+for i in $(seq "$test_count");do
+  curl --header "Content-Type: application/json" --request POST --data "$parameters" "$CAPABILITY_SERVICE"/capability/null/request/create-and-submit
+done
+
+echo "All $test_count requests submitted for Load Test.
+Please use the active requests page or the database to monitor the progress of these requests."