[Flake] integration test flake Dockerfile_test_copy_symlink

[tejal29]

the Dockerfile_test_copy_symlink has failed multiple times on Jenkins.
This test passes on Travis every single time.
Re-triggering the failed build fixes it.

--- FAIL: TestRun/test_Dockerfile_test_copy_symlink (16.90s)
        integration_test.go:188: diff = [
              {
                "Image1": "gcr.io/kaniko-test/docker-dockerfile_test_copy_symlink",
                "Image2": "gcr.io/kaniko-test/kaniko-dockerfile_test_copy_symlink",
                "DiffType": "File",
                "Diff": {
                  "Adds": [
                    {
                      "Name": "/tmp/link",
                      "Size": -1
                    }
                  ],
                  "Dels": null,
                  "Mods": [
                    {
                      "Name": "/tmp",
                      "Size1": 6,
                      "Size2": 11
                    }
                  ]
                }
              },
              {
                "Image1": "gcr.io/kaniko-test/docker-dockerfile_test_copy_symlink",
                "Image2": "gcr.io/kaniko-test/kaniko-dockerfile_test_copy_symlink",
                "DiffType": "Metadata",
                "Diff": {
                  "Adds": [],
                  "Dels": []
                }
              }
            ]
        integration_test.go:191: []integration.diffOutput differ (-got, +want):   []integration.diffOutput{
              	{
              		Image1:   "gcr.io/kaniko-test/docker-dockerfile_test_copy_symlink",
              		Image2:   "gcr.io/kaniko-test/kaniko-dockerfile_test_copy_symlink",
              		DiffType: "File",
              		Diff: &integration.fileDiffResult{
            - 			Adds: []integration.fileDiff{{Name: "/tmp/link", Size: -1}},
            + 			Adds: nil,
              			Dels: nil,
              		},
              	},
              	{Image1: "gcr.io/kaniko-test/docker-dockerfile_test_copy_symlink", Image2: "gcr.io/kaniko-test/kaniko-dockerfile_test_copy_symlink", DiffType: "Metadata", Diff: &integration.metaDiffResult{Adds: []string{}, Dels: []string{}}},
              }

[tejal29]

this also happened on Travis