Unit test ensuring that a tar.TypeXGlobalHeader does not cause an error

Docker-DCO-1.1-Signed-off-by: Abel Muiño <amuino@gmail.com> (github: amuino)
Ignore tar.TypeXGlobalHeader

Docker-DCO-1.1-Signed-off-by: Abel Muiño <amuino@gmail.com> (github: amuino)
Merge pull request #3868 from 1uptalent/3867-allow-pax-global-extended-headers-to-passthrough

FIX 3867 allow pax global extended headers to passthrough