autotest: fix Copter motortest test

We were swallowing all of the rc output containing the values we were
looking for.

Rearrange so we don't swallow where we were, and increase timeout on the
basis that there's still a narrow race.

Tools/autotest/arducopter.py

@@ -2565,7 +2565,7 @@ class AutoTestCopter(AutoTest):
                      2, # start motor
                      mavutil.mavlink.MOTOR_TEST_THROTTLE_PWM,
                      pwm_in, # pwm-to-output
-                     1, # timeout in seconds
+                     2, # timeout in seconds
                      2, # number of motors to output
                      0, # compass learning
                      0,
@@ -2578,19 +2578,19 @@ class AutoTestCopter(AutoTest):
 
         self.start_subtest("Testing percentage output")
         percentage = 90.1
+        # since MOT_SPIN_MIN and MOT_SPIN_MAX are not set, the RC3
+        # min/max are used.
+        expected_pwm = 1000 + (self.get_parameter("RC3_MAX") - self.get_parameter("RC3_MIN")) * percentage/100.0
+        self.progress("expected pwm=%f" % expected_pwm)
         self.run_cmd(mavutil.mavlink.MAV_CMD_DO_MOTOR_TEST,
                      2, # start motor
                      mavutil.mavlink.MOTOR_TEST_THROTTLE_PERCENT,
                      percentage, # pwm-to-output
-                     1, # timeout in seconds
+                     2, # timeout in seconds
                      2, # number of motors to output
                      0, # compass learning
                      0,
                      timeout=timeout)
-        # since MOT_SPIN_MIN and MOT_SPIN_MAX are not set, the RC3
-        # min/max are used.
-        expected_pwm = 1000 + (self.get_parameter("RC3_MAX") - self.get_parameter("RC3_MIN")) * percentage/100.0
-        self.progress("expected pwm=%f" % expected_pwm)
         self.wait_servo_channel_value(1, expected_pwm, timeout=10)
         self.wait_servo_channel_value(4, expected_pwm, timeout=10)
         self.wait_statustext("finished motor test")