remote-bzr: tell bazaar to be quiet

Otherwise we get notification, progress bars, and what not.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/remote-helpers/git-remote-bzr

@@ -26,6 +26,7 @@ bzrlib.plugin.load_plugins()
 import bzrlib.generate_ids
 import bzrlib.transport
 import bzrlib.errors
+import bzrlib.ui
 
 import sys
 import os
@@ -755,6 +756,8 @@ def main(args):
     if not os.path.exists(dirname):
         os.makedirs(dirname)
 
+    bzrlib.ui.ui_factory.be_quiet(True)
+
     repo = get_repo(url, alias)
 
     marks_path = os.path.join(dirname, 'marks-int')