Since the disabling of all plugins except tested onces was implemented
as an afterthought, it did not update the indirectly enabled plugins.
Instead, update the list of enabled/disabled plugins in the
optionsparser like for the -(no)load options, and trigger the update of
indirectly enabled plugins afterwards. Also take test dependencies into
account when indirectly enabling plugins directly.

Change-Id: I59d6c05de69a3073576155f7bd6201f1cd44697c
Reviewed-by: Orgad Shaneh <orgads@gmail.com>