Fix native library linking permission rejects JDK internal usage

Always deny breaks the network testing on Linux systems, so only allow
whitelisted callers.

src/main/java/de/tum/in/test/api/security/ArtemisSecurityManager.java

@@ -189,7 +189,7 @@ public void checkLink(String lib) {
 		try {
 			if (enterPublicInterface())
 				return;
-			throw new SecurityException(localized("security.error_link")); //$NON-NLS-1$
+			checkForNonWhitelistedStackFrames(() -> localized("security.error_link")); //$NON-NLS-1$
 		} finally {
 			exitPublicInterface();
 		}