We should only add user/password options if they're specified as in the
fetch case. Patch from Volker Vogelhuber <v.vogelhuber@digitalendoscopy.de>
(Bitbake rev: 303e6256947f4df4f283b75b7ccfdffa72864d67)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>