i_1205 Make standingsXML more palatable for WTI

[johnbrvc]

Description of what the PR does

WTI expects some things in the standings XML produced by the DSA to be arrays of XML objects (problem and problemSummaryInfo, specifically). If there is a single problem, these were not arrays. This code puts single objects of these into JSON arrays so WTI can process them properly and the scoreboard will show a single problem.

CI: Added sample contest with a single problem for testing.

Issue which the PR addresses

Fixes #1205

Environment in which the PR was developed (OS,IDE, Java version, etc.)

Windows 11
Java ver 1.8.0_321 build Windows 11 10.0 (amd64)

Precise steps for testing the PR (i.e., how to demonstrate that it works correctly)

1. Load up the new sample contest: clics_sumit
2. Start the contest.
3. Start an administrator client
4. Extract the WTI from this new version into a WTI folder
5. Start the WTI from a command prompt
6. Open a web browser and go to: http://localhost:8080
7. Log in as team1/team1
8. Make a single submission to the sumit problem
9. Using the "administrator", you can edit the Run (submission) and set it to "JUDGED", and "Yes"
10. View the scoreboard by clicking on the Scoreboard tab in the WTI
11. The scoreboard should show the single problem

Note: Eclipse removed end of line spaces causing the diff to be astronomical. I would set ignore blanks for the diff when evaluating this PR.