Almost as simple, one dependency less.

If no 2fa we get a redirection to contract page (before we got a 200).

Closes: 61970@sibi

We returned a false browserunavailable in some pro accounts. Here
we add a check on the redirect page.

Closes: 56215@sibi, 17824@zendesk, 17830@zendesk, 17844@zendesk, 17854@zendesk, 17858@zendesk, 17863@zendesk, 17868@zendesk, 17871@zendesk, 17905@zendesk, 17923@zendesk, 16614@zendesk, 17943@zendesk, 17957@zendesk, 17966@zendesk, 17971@zendesk

Warning: the documents tab doesn't have the same label on each child
module, so it was needed to visit each sub site to find all possible
labels

There might be more documents than displayed on the first documents
page. A button "Afficher tout" exists which shows everything. It might
be missing if we clicked it already (warning: the site is stateful for
the session).

Also, the id from URL might not reflect the document type, it has been
observed to be "EDI/..." for various document types, without "RDC" or
anything meaningful. So, type using the label instead.

As detailed in #198, adding CapDocument to s2e module allows us to list available
PDF documents (operation statements, yearly reports) and download them.
All "employee savings banks" that are using s2e module can benefit from this new
capability : in order to do this, it's necessary to change the module definition
of all these modules and have them inherit from CapDocument (otherwise the
capability coming from the parent module -s2e- is not detected by weboob-config
update).

In python2, cookies from a cookiejar are bytes, but we compare them to a
unicode string (unicode_literals). This is not a problem until there are
non-ascii bytes.

Unfortunately, sometimes the caissedepargne/palatine site returns
cookies in utf-8. So we end with non-ascii bytes.

In python3, it doesn't crash, but requests or the lower layers interpret
cookies as latin-1 instead of utf-8, which yields a few garbled
characters, but fortunately we do not care about that part of the
cookie.

Closes: 57830@sibi

These imports will be used while we shift all module imports to
weboob.capabilities.wealth, we all is done we can move the
wealth-related classes from bank.py to wealth.py
The "__all__" makes sure that classes are used to avoid pyflakes crashes
'import but unused'.

- New SCA by orange : MobileConnect, which requires a pin to be typed on the user's phone
- MobileConnect sends a notification whenever a login is made through login/password comboes
- Implemented StatesMixin interface to limit the number of text messages sent to the end-user
- Added LoggedOut raise to get_subscription_list, in case the cookies expire, forcing a login, and
  retrying the get_subscription_list

- xvfb is required for blinkpdf 1.0, but not for 1.1
- xvfb is not necessary for QtWebEngine 5.14, but it is for 5.11, which is the version
  available on the ppa for debian/buster stable

We retrieve statement documents but we didn't update the 
accepted_document_types

Closes: 17765@zendesk

For wealth accounts, we can also fetch the market orders (passages
d'ordres) on the corresponding tab.

Some internal recipients cannot be parsed on the website and so, do not
appear in the iter_accounts. Those accounts do not have the id in their
label, so we need to change where the id is gathered from.
The `value` of each `option` of the select is the same as the id we
can parse from the label, so we can directly get the id from the `value`
attribute.

Closes: 53010@sibi 53027@sibi

In this new url found in the iframe, we have to skip it
(réglementation en matière de lutte contre le blanchiment). It's not
accountpage, consequently a ActionNeededPage is add.

Closes: 46647@sibi

New recipients labels are stripped on the website. Without stripping
them, it sometimes failed the assert in `check_values` because of the
trailing space we still had.

Closes: 61817@sibi

- unicode_litterals import added to modules/free/browser.py and modules/free/module.py
- removed unused unit test
- raise WebsiteUnavailable if there are too many requests instead of raising an AssertionError

Closes: 50138@sibi

Some investment tables have a different xpath from the other ones for
the last line of the table.

Closes: 17649@zendesk

There is only one browser now, no need to keep the /api folder.
Also added a comment on how we build the BASEURL from the website
choice.

The existing code had support for DecoupledValidation only for
recipients. This allows to suppport DecoupledValidation for transfers as
well.