Added field for inputting raw Behavior Tree xml into DoObjectiveSequence.action (#79)

Author: bgill92

moveit_studio_msgs/moveit_studio_sdk_msgs/action/DoObjectiveSequence.action

@@ -1,7 +1,11 @@
 # goal
 
+# The name of the objective to run
 string objective_name
 
+# The raw behavior tree xml as a string. If both objective_name and objective_xml_string are populated, this will throw an error.
+string objective_xml_string
+
 # Default values of named parameters in the predefined objective will be overridden by the values provided in `parameter_overrides` below.
 moveit_studio_sdk_msgs/BehaviorParameter[] parameter_overrides
 ---