Do not prefix writer method names with set_

It may not be perfect, but with this workarount rubocop is happy and the
code is still readable.

Change-Id: I18ab6a032eda47ded6e3de660355efddd6ccbfc4
Reviewed-on: http://gerrit.causes.com/37452
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Shane da Silva <shane@causes.com>