Add security_options to rmw_create_node argument list (#168)
Add security_options to rmw_create_node argument list (#168)

* placeholder for secure node

* match new signature

* new new signature...

* use rmw_node_security_options structure

* variable not unused anymore

* rename options to security_options

* nitpick

* check security_options argument for null before using it

ros2/rmw_opensplice