* shorter toString in SeReqExecuteScript (first 50 chars)
* better logging for exception while executing action in server
Merge remote-tracking branch 'upstream/feature-ff-screens' into feature-ff-screens
* reverted back to using icewm and x11vnc in create display
* refactored toString method in SeReqExecuteScript
* set logback to TRACE
* added getDriverFDromPool method in SessionActor
* added destroying displays when firefox is done
* removed x11vnc creation
Merge remote-tracking branch 'presjednik/feature-ff-screens' into feature-ff-screens