Add current comment resolution status to REST

REST endpoints:

1. /rest-service/reviews-v1/{id}/comments
2. /rest-service/reviews-v1/{id}/comments/general
3. /rest-service/reviews-v1/{id}/comments/versioned
4. /rest-service/reviews-v1/{id}/comments/{cId}
5. /rest-service/reviews-v1/{id}/comments/{cId}/replies
6. /rest-service/reviews-v1/{id}/reviewitems/{riId}/comments

need to get current resolution status (needs resolution (by whom) / resolved (by whom)). Probably 1 change will fix all of the endpoints listed above.

Getting full history (if implemented at all) needs a separate end point.

Note the data is already exposed in Java API, see https://docs.atlassian.com/fisheye-crucible/latest/javadoc/com/atlassian/crucible/spi/services/ReviewService.html#getCommentResolution-com.atlassian.crucible.spi.PermId-