Renamed service to "GetRobotSoftwareVersion" everywhere.

Also moved the version information from being stored in the command interface to be stored in the state interface

Author: URJala

ur_robot_driver/test/robot_driver.py

@@ -250,7 +250,7 @@ def test_trajectory_scaled(self, tf_prefix):
         self.assertEqual(result.error_code, FollowJointTrajectory.Result.SUCCESSFUL)
 
     def test_tool_contact(self, tf_prefix):
-        if self._io_status_controller_interface.get_version().major < 5:
+        if self._io_status_controller_interface.get_robot_software_version().major < 5:
             start_result = self._io_status_controller_interface.start_tool_contact()
             self.assertEqual(start_result.success, False)