add expansion module

add new expansion keys for new devices

Reviewed-by: Alexandre Fournier <None>
Reviewed-by: Franck M <None>

Wazo 2910 - python3 plugins

Depends-On: wazo-platform/wazo-provd#55
Note: This should not be merged until we are ready to release the new repo

Reviewed-by: Alexandre Fournier <None>

for tests

cannot run on older stacks

add very minimal typing to debug in future.

Remove import of models from Yealink v86 since it doesn't seem to work

in some cases. Also fix tests and dependencies

Reviewed-by: Alexandre Fournier <None>

Remove import of models from Yealink v86 since it doesn't seem to work in some cases. Also fix tests and dependencies

WAZO-2586 - Pytest for py27 & py37

…th work

Reviewed-by: Alexandre Fournier <None>
Reviewed-by: Jesse Sopel <None>
Reviewed-by: Pascal Cadotte Michaud <None>