Add coverage for missing node_modules error in snyk test
Add coverage for missing node_modules error in snyk test

[#160155740]

Co-authored-by: Tyler Phelan <5713437ebd3bcae14564c2baaa7816b900ed174c@pivotal.io>

cloudfoundry/nodejs-buildpack,cloudfoundry/nodejs-buildpack,cloudfoundry/nodejs-buildpack,cloudfoundry/nodejs-buildpack