Multiple sort options in combinations with cursor fails. Invalid handling of comma.

[alstanchev]

A search query that uses nore than one sort property is not handled properly sort(-attributes/type,+features/some),size(200),cursor(...).

In the case where there is no cursor there is no error. But in case a cursor is included the problem manifests.

In ThingSearchRoute in the calculateOptions method options are parsed by comma which leads to incorectly dividing the sort part and leading to
{ "status": 400, "error": "thing-search:search.option.invalid", "message": "Invalid input '+', expected Sort, Limit, Cursor or Size (line 1, column 35):\nsort(-/attributes/type,+/thingId),+thingId),size(2),cursor(....)\n, "description": "At least one provided option is invalid." }

[thjaeckle]

@alstanchev do you expect to provide a fix soon? #1798 is really a blocker for us, so I would want to quickly build a 3.4.1 bugfix release.

[alstanchev]

Yes, it is ready. Just want to wait for the system tests to be sure. Will push it tomorrow.