[FIX] packaging: add qrcode package to docker file

After the Odoo package is built, the package.py script uses a Docker
image to test the package. After that python3-qrcode was added as a
dependency for the package in 2ff49c5f , it revealed some issues.

A missing cli parameter and a forgotten '&&' in the Dockerfile prevented
the installation of the depending packages.

Also, the script shebang was wrong by launching python2.

Finally, the fact that python3-xlwt is missing in Debian stretch was
highlighted. With this commit, the python3-xlwt is explicitly removed
from the dependencies and the documentation is updated accordingly.

closes odoo/odoo#28807

1 files changed, 4 insertions, 10 deletions

diff --git a/doc/setup/install.rst b/doc/setup/install.rst
index 218b7bb5a7d..1088d90d8d8 100644
--- a/doc/setup/install.rst
+++ b/doc/setup/install.rst
@@ -169,21 +169,15 @@ Or ``dpkg``:
 This will install Odoo as a service, create the necessary PostgreSQL_ user
 and automatically start the server.
 
-.. warning:: The 3 following python packages are only suggested by the Debian package.
-             Those packages are not available in Ubuntu Xenial (16.04).
+.. warning:: The python3-xlwt Debian package does not exists in Debian Stretch nor Ubuntu 18.04.
+             This python module is needed to export into xls format.
 
-* python3-vobject: Used in calendars to produce ical files.
-* python3-pyldap: Used to authenticat users with LDAP.
-* python3-qrcode: Used by the hardware driver for ESC/POS
-
-If you need one or all of the packages mentioned in the above warning, you can install them manually.
+If you need the feature, you can install it manually.
 One way to do it, is simply using pip3 like this:
 
 .. code-block:: console
 
-    $ sudo pip3 install vobject qrcode
-    $ sudo apt install libldap2-dev libsasl2-dev
-    $ sudo pip3 install pyldap
+    $ sudo pip3 install xlwt
 
 .. warning:: Debian 9 and Ubuntu do not provide a package for the python module
              num2words.