soledad-common debian package is missing python-routes dependency

See: leap_mx#8666 (closed)

# apt show soledad-common
Package: soledad-common
Source: soledad
Version: 0.10.2+0~20170908124352.18001+master+jessie~67.g5d8b834
Maintainer: Micah Anderson <micah@debian.org>
Installed-Size: 321 kB
Depends: python:any (<< 2.8), python:any (>= 2.7.5-5~), python-leap-common, python-simplejson, python-six, python-twisted-core (>= 13.0.0), python-treq
Provides: leap.soledad.common
Priority: optional
Section: python
Download-Size: 49.7 kB
APT-Manual-Installed: yes
APT-Sources: http://deb.leap.se/platform/ jessie/master amd64 Packages
Description: Synchronization of locally encrypted data among devices (common files)
 Soledad is the part of LEAP that allows application data to be securely
 shared among devices. It provides, to other parts of the LEAP client, an
 API for data storage and sync.
 .
 This package contains the common soledad libraries. For the server, see the
 soledad-server package