coordination: add option to jump into state-machines

by passing the argument :starting_state the user can choose
states in which a statemachine should start.

These states needs to be dinfed within the statemachine as:

prepare_jumpin("wall" => wall1, "pipeline"=> pipeline1)
It would be much better, there, to define a find_task_by_name method on the Coordination::Models::Base instead of doing the find manually