10.15 platform testing

[Rick Hillegas]

I have finished my testing of 10.15.1.3. The results are recorded at 
https://wiki.apache.org/db-derby/TenFifteenOnePlatformTesting and 
https://wiki.apache.org/db-derby/TenFifteenChecklist. I have not found 
any problems.

It would be good to see platform test results from people who have 
access to Windows and Linux machines.

Thanks,

-Rick