First calculate elapsed time before logging error

since elapsed time shouldn't include time spent on logging the error.

Change-Id: I69bec59819d515c0456d6abc7a9933fffbedebcc

src/main/java/com/googlesource/gerrit/plugins/healthcheck/check/AbstractHealthCheck.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/healthcheck/check/AbstractHealthCheck.java b/src/main/java/com/googlesource/gerrit/plugins/healthcheck/check/AbstractHealthCheck.java
index db0657e..0234e8f 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/healthcheck/check/AbstractHealthCheck.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/healthcheck/check/AbstractHealthCheck.java
@@ -101,8 +101,8 @@
   }
 
   private StatusSummary handleError(long ts, Exception e, String message, Result result) {
-    log.warn(message, e);
     Long elapsed = System.currentTimeMillis() - ts;
+    log.warn(message, e);
     StatusSummary checkStatusSummary =
         new StatusSummary(result, ts, elapsed, Collections.emptyMap());
     failureCounterMetric.increment();