The "sortInfo" parameter on DocumentPageProviderOperation doesn't work when specifying sort direction

On nuxeo-automation-features > DocumentPageProviderOperation.java (l.103), the "sortInfo" parameter is not parsed correctly when using the "|" delimiter as suggested by:

                if (sortInfoDesc.contains("|")) {
                    String[] parts = sortInfoDesc.split("|");
                    sortInfo = new SortInfo(parts[0],
                            Boolean.parseBoolean(parts[1]));

The regexp "|" is invalid and matches every character.

A workaround is to use the "Social.Provider" operation instead.

I'll submit a pull request for this issue.