* smarter function to figure out relative paths
takes list of paths in order of relevance to current task
and does the dwim magic on them
* shared function for action plugins using new dwim
unify path construction and error info/messaging
made include and role non exclusive
corrected order and now smarter about tasks
includes inside roles are currently broken as they don't provide the correct role data
make dirname full match to avoid corner cases
* migrated action plugins to new dwim function
reported plugins to use exceptions instead of info
* clarified needle
* Fix the task_vars parameter to not default to a mutable type (dict)
* Implement invocation in the base class's run() method have each action
module call the run() method's implemention in the base class.
* Return values from the action plugins' run() method takes the return
value from the base class run() method into account so that invocation
makes its way to the output.
Fixes#12869
