[FIX] runbot: avoid 404 errors in fast_launch url for odoo >= 9 (odoo#92)

Fix Vauxoo/runbot-addons#88

Cherry-pick from odoo@c1ac96e

Author: moylop260

runbot/runbot.py

@@ -1547,8 +1547,14 @@ def fast_launch(self, branch_name=False, repo=False, **post):
             if last_build.state != 'running':
                 url = "/runbot/build/%s?ask_rebuild=1" % last_build.id
             else:
-                url = ("http://%s/login?db=%s-all&login=admin&key=admin%s" %
-                       (last_build.domain, last_build.dest, "&redirect=/web?debug=1" if not build.branch_id.branch_name.startswith('7.0') else ''))
+                branch = build.branch_id.branch_name
+                if branch.startswith('7'):
+                    base_url = "http://%s/login?db=%s-all&login=admin&key=admin"
+                elif branch.startswith('8'):
+                    base_url = "http://%s/login?db=%s-all&login=admin&key=admin&redirect=/web?debug=1"
+                else:
+                    base_url = "http://%s/web/login?db=%s-all&login=admin&redirect=/web?debug=1"
+                url = base_url % (last_build.domain, last_build.dest)
         else:
             return request.not_found()
         return werkzeug.utils.redirect(url)