Port POI patches

[antony-liu]

POI patches:

• bug 60260: parse unicode sheet names
• bug 60601: unset hyperlinks after removing them individually from the DOM
• bug 60601: allow SXSSFITestDataProvider.writeOutAndReadBack(Workbook wb) to work on SXSSFWorkbooks and XSSFWorkbooks
• bug 60601: hyperlinks have to be removed one by one to avoid other errors
• bug 60601: unlink hyperlinks from a sheet if all hyperlinks have been removed. Patch from Joachim Piketz
• refactor duplicated code in TestXSSFSheet#setColumnGroupCollapsed; remove unnecessary int to short casts

[Bykiev]

LGTM

[tonyqus]

@antony-liu Since #1329 merge, there are some conflicts in TestXSSFSheet.cs. Can you help resolve the conflicts? I'm not so familar with the group column logic

[antony-liu]

There are two functions IsSetHyperlinks and IsSetHyperLinks in class CT_Worksheet. They have the same function。And IsSetHyperLinks is never used, so remove it.

[tonyqus]

What's the plan for TestSetColumnGroupCollapsed? I think @artem-iron has made it work. Has any bug been ported from POI 3.16?

[antony-liu]

I think it's due to outdated code implementation of XSSFSheet.GroupColumn and XSSFSheet.SetColumnGroupCollapsed. It is completely different from POI 3.16, I tried porting it, but it would cause some other test cases to fail.

I plan to start porting after completing POI 3.16.

[tonyqus]

@antony-liu I don't see you changed any code about TestSetColumnGroupCollapsed in the file changes. Is it caused by the incorrect merge? Can we follow Artem's implementation? At least, his changes don't break the unit test.

[tonyqus]

The merge is wrong. You should not remove the Assert code from Artem.

Can you rollback and remerge? And then re-enable TestSetColumnGroupCollapsed test.

Another choice is that you recreate a branch based on master and reapply all the rest commits to the branch. And don't touch anything about ColumnGroupCollapse

[antony-liu]

OK. I have reverted it, and enabled the test TestSetColumnGroupCollapsed.

The commit 1ade0af change code of TestSetColumnGroupCollapsed. But it is not compatible with method XSSFSheet.GroupColumn and XSSFSheet.SetColumnGroupCollapsed.

[tonyqus]

LGTM