fix: tidy up after replay tests PR (#2471)

This tidies two things up after the replay tests PR.  Firstly, the
`build.gradle` file for the reference-tests is updated to use
`JUNIT_TESTS_PARALLELISM` to match the github workflow; secondly, the
disable replay test in BlockhashTest is removed, since it was a
duplicate.  Specifically, the replay tests for BlockHash are now in
`pragueReplayTests/BlockHashTests`.

Author: DavePearce

arithmetization/src/test/java/net/consensys/linea/pragueReplayTests/SepoliaTests.java renamed to arithmetization/src/test/java/net/consensys/linea/pragueReplayTests/BlockHashTests.java

@@ -26,15 +26,19 @@
 
 @Tag("replay")
 @ExtendWith(UnitTestWatcher.class)
-public class SepoliaTests extends TracerTestBase {
+public class BlockHashTests extends TracerTestBase {
 
   @Test
-  void block_19562398(TestInfo testInfo) {
+  void someHistoricalHashesAreChecked(TestInfo testInfo) {
     replay(SEPOLIA_PRAGUE_TESTCONFIG, "prague/19562398.sepolia.prague.json.gz", testInfo);
   }
 
+  /**
+   * The purpose of this second replay tests is to provide two consecutive conflation to the prover,
+   * with BLOCKHASH checking the "historical hashes" in both conflations.
+   */
   @Test
-  void block_19562399_19562417(TestInfo testInfo) {
+  void conflationFollowingThePreviousOneWithAgainHistoricalBlockhashesChecked(TestInfo testInfo) {
     replay(SEPOLIA_PRAGUE_TESTCONFIG, "prague/19562399-19562417.sepolia.prague.json.gz", testInfo);
   }
 }

arithmetization/src/test/java/net/consensys/linea/zktracer/module/blockhash/BlockhashTest.java

@@ -15,8 +15,6 @@
 
 package net.consensys.linea.zktracer.module.blockhash;
 
-import static net.consensys.linea.ReplayTestTools.replay;
-import static net.consensys.linea.zktracer.ChainConfig.SEPOLIA_PRAGUE_TESTCONFIG;
 import static net.consensys.linea.zktracer.Trace.BLOCKHASH_MAX_HISTORY;
 
 import java.util.List;
@@ -32,7 +30,6 @@
 import org.hyperledger.besu.datatypes.Hash;
 import org.hyperledger.besu.datatypes.Wei;
 import org.hyperledger.besu.ethereum.core.Transaction;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Tag;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.TestInfo;
@@ -100,17 +97,6 @@ void singleBlockBigRangeBlockhashTest(TestInfo testInfo) {
         .run(chainConfig, testInfo);
   }
 
-  /**
-   * The purpose of this second replay tests is to provide two consecutive conflation to the prover,
-   * with BLOCKHASH checking the "historical hashes" in both conflations.
-   */
-  @Tag("replay")
-  @Disabled("Disabled, see comment")
-  @Test
-  void conflationFollowingThePreviousOneWithAgainHistoricalBlockhashesChecked(TestInfo testInfo) {
-    replay(SEPOLIA_PRAGUE_TESTCONFIG, "19562399-19562417.mainnet.json.gz", testInfo);
-  }
-
   /**
    * This test calls the tracer through the RPC, using a besu node. It computes several block, each
    * block containing a BLOCKHASH opcode with different argument (in range, ridiculously not in

reference-tests/build.gradle

@@ -78,7 +78,7 @@ tasks.register('referenceExecutionSpecBlockchainTests', Test) {
     systemProperty("junit.jupiter.execution.parallel.mode.classes.default", "concurrent")
     systemProperty("junit.jupiter.execution.parallel.config.strategy", "fixed")
     systemProperty("junit.jupiter.execution.parallel.config.fixed.parallelism",
-            System.getenv().getOrDefault("REFERENCE_TESTS_PARALLELISM", "1").toInteger())
+            System.getenv().getOrDefault("JUNIT_TESTS_PARALLELISM", "1").toInteger())
   }
 
   useJUnitPlatform {