Github actions from upstream OpenJDK running on PRs

[AdamBrousseau]

Seems OpenJDK added Github actions to their repo recently

https://github.com/ibmruntimes/openj9-openjdk-jdk/commits/openj9/.github/workflows/submit.yml

This will cause these checks to run on our PRs.
Few options to take

1. Disable GitHub actions complete on our repo(s)
2. Remove the file from the OpenJ9 branch. Will likely cause merge conflicts every time they update the file(s)
3. Fix the file so it works for OpenJ9 build/test. This will cause merge conflicts less often than removing the file completely.

[pshipton]

I'd like to try option 3 first, fix the builds so they can build Openj9 (fetch openj9 source, configure with freemarker), and then see how we do on the testing.