Quick reply does not respect subscribe on reply user preference

Need this testing in all branches, specifically 36_STABLE, where a new function is being added. # Log in as Admin Create a course. Create a Forum. Create 2 discussions (discussion1, discussion2). Enrol a user in the Course. Test auto-subscription Log in as the User enrolled in the Course. Go to the Forum  make sure the user is not subscribed to discussion1 and discussion2. Go to User preferences > Forum preferences set Forum auto-subscribe = "Yes: when I post, subscribe me to that forum discussion" Go back to the Forum. Go to  discussion1. Add an inline reply to a discussion post. make sure the User is now automatically subscribed to discussion1 (reload might be needed to update the subscribe button in the discussion page) Go to User preferences > Forum preferences set Forum auto-subscribe = "No: don't automatically subscribe me to forum discussions" Go back to the Forum. Go to  discussion2. Add an inline reply to a discussion post. make sure the User is still not subscribed to discussion2 (reload might be needed to update the subscribe button in the discussion page) ** Test webservice Log in as Admin. Enable web services (Site administration > Advanced features). Create a tokens for the User which is enrolled in the Course (Site administration > Plugins > Web services > Manage tokens). Please follow the additional instructions on how to configure/use web services ( https://docs.moodle.org/37/en/Using_web_services ) Log in as User. Go to the Course > Forum. Unsubscribe from discussion1 and discussion2.  Call the mod_forum_add_discussion_post web service as the User (discussionsubscribe = 1) MOODLEINSTANCE/webservice/rest/server.php?wsfunction=mod_forum_add_discussion_post&wstoken=TOKEN&postid=POSTID&subject=REPLYSUBJECT&message=REPLYMESSAGE&options [0] [name] =discussionsubscribe&options [0] [value] =1 through a HTTP client for testing web services (ex. Postman) where: wstoken = the token created for the User;  postid = the ID of the discussion1 post the user is replying to; subject = the reply subject message = the reply message options =  additional option parameters Log in as User. Go to the Course > Forum > Discussion1 make sure the User is now automatically subscribed to Discussion1 and the post reply has been successfully created. Call the mod_forum_add_discussion_post web service as the User (discussionsubscribe = 0) MOODLEINSTANCE/webservice/rest/server.php?wsfunction=mod_forum_add_discussion_post&wstoken=TOKEN&postid=POSTID&subject=REPLYSUBJECT&message=REPLYMESSAGE&options [0] [name] =discussionsubscribe&options [0] [value] =0 through a HTTP client for testing web services (ex. Postman) where: postid = the ID of the discussion2 post the user is replying to; As User, go to Course > Forum > DIscussion2 make sure the User is still not subscribed to Discussion2 and the post reply has been successfully created. As User, go to User preferences > Forum preferences set Forum auto-subscribe = "Yes: when I post, subscribe me to that forum discussion" Call the mod_forum_add_discussion_post web service as the User, without passing a value for discussionsubscribe MOODLEINSTANCE/webservice/rest/server.php?wsfunction=mod_forum_add_discussion_post&wstoken=TOKEN&postid=POSTID&subject=REPLYSUBJECT&message=REPLYMESSAGE through a HTTP client for testing web services (ex. Postman) where: postid = the ID of the discussion2 post the user is replying to; Go to the Course > Forum > Discussion2 make sure the User is now automatically subscribed to Discussion2 and the post reply has been successfully created.