[backport] use correct synchronous service call (#1006)

Backport from #792
to fix #838

Co-authored-by: Christian Rauch <Rauch.Christian@gmx.de>

camera_calibration/src/camera_calibration/camera_calibrator.py

@@ -193,10 +193,8 @@ def handle_stereo(self, msg):
 
 
  def check_set_camera_info(self, response):
- if response.done():
- if response.result() is not None:
- if response.result().success:
- return True
+ if response.success:
+ return True
 
  for i in range(10):
  print("!" * 80)
@@ -218,14 +216,14 @@ def do_upload(self):
  rv = True
  if self.c.is_mono:
  req.camera_info = info
- response = self.set_camera_info_service.call_async(req)
+ response = self.set_camera_info_service.call(req)
  rv = self.check_set_camera_info(response)
  else:
  req.camera_info = info[0]
- response = self.set_left_camera_info_service.call_async(req)
+ response = self.set_left_camera_info_service.call(req)
  rv = rv and self.check_set_camera_info(response)
  req.camera_info = info[1]
- response = self.set_right_camera_info_service.call_async(req)
+ response = self.set_right_camera_info_service.call(req)
  rv = rv and self.check_set_camera_info(response)
  return rv