use sudo nice for running maven test server

Author: oscarsj

java/ql/integration-tests/java/buildless-inherit-trust-store/test.py

@@ -1,10 +1,15 @@
 import subprocess
 import os
+import runs_on
 
 
 def test(codeql, java, cwd):
     # This serves the "repo" directory on https://locahost:4443
-    repo_server_process = subprocess.Popen(["python3", "../server.py"], cwd="repo")
+    command = ["python3", "../server.py"]
+    if runs_on.github_actions and runs_on.posix:
+        # On GitHub Actions, we try to run the server with higher priority
+        command = ["sudo", "nice", "-n", "10"] + command
+    repo_server_process = subprocess.Popen(command, cwd="repo")
     certspath = cwd / "jdk8_shipped_cacerts_plus_cert_pem"
     # If we override MAVEN_OPTS, we'll break cross-test maven isolation, so we need to append to it instead
     maven_opts = os.environ["MAVEN_OPTS"] + f" -Djavax.net.ssl.trustStore={certspath}"