Fix workflow failures

Currently, workflow failures are being recorded as passing.  The reason
for this is simply a flag within the yaml file that was presumably
copied over from the original gradle tests.  This should now resolve the
issus, and make sure that when the workflow fails --- we see that.

.github/workflows/reference-blockchain-tests.yml

@@ -65,7 +65,6 @@ jobs:
       - name: Run reference blockchain tests
         run: ./gradlew referenceBlockchainTests -x spotlessCheck
         timeout-minutes: 180
-        continue-on-error: true
         env:
           REFERENCE_TESTS_PARALLELISM: 7
           JAVA_OPTS: -Dorg.gradle.daemon=false