Fix mercurial fetching after breakage from changes to the core fetcher.
Fix username and password usage and setting moddir needed by setup_revisions.
(Bitbake rev: 8962b27abc68427eae085624f26300108ae88aa1)
Signed-off-by: Volker Vogelhuber <v.vogelhuber@digitalendoscopy.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>