message: integration_tests: small bugfix against arm fails
  If the tests are run in quick succession they can fail because the
  previous test has not disarmed yet.
diff: @@ -121,6 +121,11 @@ TEST_F(SitlTest, OffboardVelocityNED)
  action_ret = action->land();
  EXPECT_EQ(action_ret, Action::Result::Success);
  +
  + while (telemetry->armed()) {
  + // Wait until we're done.
  + std::this_thread::sleep_for(std::chrono::seconds(1));
  + }
  }
  TEST_F(SitlTest, OffboardVelocityBody)
  @@ -205,4 +210,9 @@ TEST_F(SitlTest, OffboardVelocityBody)
  action_ret = action->land();
  EXPECT_EQ(action_ret, Action::Result::Success);
  +
  + while (telemetry->armed()) {
  + // Wait until we're done.
  + std::this_thread::sleep_for(std::chrono::seconds(1));
  + }
  }
  