Up to now, the minor updates workarounds was not being used very much
being a little bit left away in comparision with what it was implemented
for the upgrades one. This patch allows minor updates to benefit from
the same workarounds mechanism, at the same time that any improvement
in the upgrades mechanism will be available for updates too.
Also, it was removed the references to the {{ working_dir }} variable
in those shell tasks which have the argument changing directory to that
very same {{ working_dir }}, mostly to simplify the tasks and remove
redundancy.
Change-Id: Ibc57c51ff19ebad093c887bee545ca6a7d51827f
(cherry picked from commit ef15456503)
16b698553b