Fix security issues reported by Black Duck (#5014) #834

Job	Run time
Start	7s
Build Piper	1m 18s
Build integration tests	20s
Run integration tests ("(TestCNBIntegrationBindings\|TestCNBIntegrationWrongBuilderProject\|TestCNB...	1m 50s
Run integration tests ("TestCNBIntegrationPreserveFiles\b")	1m 25s
Run integration tests ("TestCNBIntegrationNPMProject")	2m 2s
Run integration tests ("TestCNBIntegrationMultiImage")	2m 32s
Run integration tests ("TestCNBIntegrationNPMCustomBuildpacksBuildpacklessProject")	1m 42s
Run integration tests ("TestCNBIntegrationNPMCustomBuildpacksFullProject")	1m 22s
Run integration tests ("TestCNBIntegrationProjectDescriptor")	1m 22s
Run integration tests ("TestCNBIntegrationPrePostBuildpacks")	1m 24s
Run integration tests ("TestGolangIntegration")	1m 48s
Run integration tests ("TestGradleIntegration")	1m 41s
Run integration tests ("TestMavenIntegration")	1m 48s
Run integration tests ("TestMTAIntegration")	1m 56s
Run integration tests ("TestTmsUploadIntegration")	1m 1s
Run integration tests ("TestTmsExportIntegration")	1m 0s
Run integration tests ("Test(Gauge\|GCS\|GitHub\|GitOps\|Influx\|NPM\|Piper\|Python\|Sonar\|Vault\|Karma)In...	1m 14s
Finish	1s
	25m 53s

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