3.141.59-xenon

Bump geckodriver to version 0.26.0
Bump firefox to version 70.0

Bump Chromedriver to version 78.0.3904.70
Bump Chrome to version 78.0.3904.70

base dockerfile optimization: reduction of the layer (#973) :: Diego Molina

Feature: Deleted not needed mkdir (#974) :: Diego Molina

GeckoDriver v0.26.0 (#975) :: Diego Molina

Upgrade build env to bionic and python version to the v3.8.0 (#976) :: Diego Molina

3.141.59-xenon release :: ddavison