Transient error for `TestFixupBundleCheckResolveOrder`

[radu-matei]

--- FAIL: TestFixupBundleCheckResolveOrder (0.04s)
    fixup_test.go:354: assertion failed: error is not nil: unexpected end of JSON input

[radu-matei]

FWIW, master also experiences a transient failure on the same test:

--- FAIL: TestFixupBundleCheckResolveOrder (0.05s)
    fixup_test.go:354: assertion failed: error is not nil: failed to resolve or push image for service "not-in-relocation"