D3059: tests: use `hg unbundle` instead of `hg pull` in some tests

[durin42 (Augie Fackler)]

durin42 added a comment.


  Answered my own question, a couple of callsites are left. :)

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D3059

To: indygreg, durin42, #hg-reviewers
Cc: mercurial-devel