Improve GRADLE build Performance

[shisheng-1]

Process forking options. Gradle will run all tests in a single forked VM by default. This can be problematic if there are a lot of tests or some very memory-hungry ones. We can fork a new test VM after a certain number of tests have run by setting forkEvery.

===================== If there are any inappropriate modifications in this PR, please give me a reply and I will change them.