Replace calls in the reveal mechanism in the right order

Author: Ugo Plouviez

src/main/java/com/iexec/worker/chain/RevealService.java

@@ -35,6 +35,9 @@ public boolean canReveal(String chainTaskId, long consensusReachedBlockNumber) {
         }
         ChainTask chainTask = optionalChainTask.get();
 
+        boolean isChainTaskRevealing = iexecHubService.isChainTaskRevealingWhenNodeNotSync(chainTaskId, consensusReachedBlockNumber);
+        boolean isRevealDeadlineReached = chainTask.getRevealDeadline() < new Date().getTime();
+
         Optional<ChainContribution> optionalContribution = iexecHubService.getChainContribution(chainTaskId);
         if (!optionalContribution.isPresent()) {
             log.error("Contribution couldn't be retrieved [chainTaskId:{}]", chainTaskId);
@@ -44,9 +47,6 @@ public boolean canReveal(String chainTaskId, long consensusReachedBlockNumber) {
         boolean isChainContributionStatusContributed = chainContribution.getStatus().equals(ChainContributionStatus.CONTRIBUTED);
         boolean isContributionResultHashConsensusValue = chainContribution.getResultHash().equals(chainTask.getConsensusValue());
 
-        boolean isChainTaskRevealing = iexecHubService.isChainTaskRevealingWhenNodeNotSync(chainTaskId, consensusReachedBlockNumber);
-        boolean isRevealDeadlineReached = chainTask.getRevealDeadline() < new Date().getTime();
-
         boolean isContributionResultHashCorrect = false;
         boolean isContributionResultSealCorrect = false;
         String deterministHash = resultService.getDeterministHashForTask(chainTaskId);