cnf ran: fix image registry automation issue (#208)

The image registry test in ztp-argocd-policies-app.go has been consistently failing in CI because restoring the image registry would fail. This PR fixes that issue by saving an the image registry config earlier in the test so that it can be restored properly.

tests/cnf/ran/gitopsztp/tests/ztp-argocd-policies-app.go

@@ -132,10 +132,14 @@ var _ = Describe("ZTP Argo CD Policies Tests", Label(tsparams.LabelArgoCdPolicie
 
 		// 54354 - Ability to configure local registry via du profile
 		It("verifies the image registry exists", reportxml.ID("54354"), func() {
+			By("saving image registry config before modification")
+			imageRegistryConfig, _ = imageregistry.Pull(Spoke1APIClient, tsparams.ImageRegistryName)
+
 			By("updating Argo CD policies app")
 			exists, err := gitdetails.UpdateArgoCdAppGitPath(
 				tsparams.ArgoCdPoliciesAppName, tsparams.ZtpTestPathImageRegistry, true)
 			if !exists {
+				imageRegistryConfig = nil
 				Skip(err.Error())
 			}
 
@@ -149,9 +153,6 @@ var _ = Describe("ZTP Argo CD Policies Tests", Label(tsparams.LabelArgoCdPolicie
 				fmt.Sprintf("ls %s", tsparams.ImageRegistryPath))
 			Expect(err).ToNot(HaveOccurred(), "Image registry directory '%s' does not exist", tsparams.ImageRegistryPath)
 
-			imageRegistryConfig, err = imageregistry.Pull(Spoke1APIClient, tsparams.ImageRegistryName)
-			Expect(err).ToNot(HaveOccurred(), "Failed to pull image registry config")
-
 			By("waiting for the policies to exist and be compliant")
 			for _, policyName := range tsparams.ImageRegistryPolicies {
 				policy, err := helper.WaitForPolicyToExist(