Wootric shouldn't by default, send an Event name to Segment

[dube-mike]

This all stared when it became obvious, on our end that users opting into our Wootric surveys went down significantly after a pod update.

This is because, after 'Segment-Wootric', '0.2.1' the SDK's behaviour changed automatically and by default the event name is sent.

See WTRWootricIntegration.m line 45

- (void)track:(SEGTrackPayload *)payload {
  NSDictionary *properties = payload.properties;
  NSString *eventName = payload.event;
  NSString *language = [properties objectForKey:@"language"];

  if (language) {
    [Wootric setCustomLanguage:language];
  }

  [Wootric setEventName:eventName];
}

This automatically started causing issues on our end as we saw a massive fall in users who participated in our surveys.

This is definitely an issue in the SDK, by default, it shouldn't be sending a an event name.