/brz/remove-bazaar

Fix #128076 and #131396 by reusing bound branch transport.

* bzrlib/bzrdir.py:
(BzrDir.open): Add possible_transports as the last parameter.

* bzrlib/builtins.py:
(cmd_update.run): Use possible_transports parameter to obtain the
master branch transport and reuse it.

* bzrlib/branch.py:
(Branch.open, Branch.get_master_branch,
BzrBranch5.get_master_branch, BzrBranch5.update): Add
possible_transports as the last parameter.

* bzrlib/workingtree.py:
(WorkingTree.update): Add possible_transports as the last parameter.

* bzrlib/tests/commands/test_update.py:
(TestUpdate.test_update): Ignore connections from bind.