NO-JIRA: refactor: test with --runInBand, runs faster with less memory.

runInBand runs tests serially in a single node process, rather than starting parallel node processes.
The tests themselves use very little CPU/memory compared to starting a node process,
so this works out faster and uses much less memory.

Author: alanconway

web/package.json

@@ -16,7 +16,7 @@
     "lint": "eslint ./src ./integration-tests --fix &&  stylelint \"src/**/*.css\" --allow-empty-input --fix",
     "lint:tsc": "tsc --noEmit",
     "test:e2e": "cd ./integration-tests && cypress open --env openshift=true",
-    "test:unit": "jest --config jest.config.js",
+    "test:unit": "jest --runInBand --config jest.config.js",
     "test:unit:watch": "jest --config jest.config.js --watch",
     "test:unit:coverage": "jest --config jest.config.js --coverage"
   },