tests: Set a low value for -Xmx
It defaults to 90% of the total RAM, which means Java effectively never frees any memory, and it prevents running more than a couple of tests in parallel.
Resolves #4769 (closed)
It defaults to 90% of the total RAM, which means Java effectively never frees any memory, and it prevents running more than a couple of tests in parallel.
Resolves #4769 (closed)