GOCBC-512: Add error helper for DurableWriteReCommitInProgress

Change-Id: I6d75f7a50ea950ab1fafb566617480e8e22a9604
Reviewed-on: http://review.couchbase.org/114691
Reviewed-by: Mike Goldsmith <goldsmith.mike@gmail.com>
Tested-by: Charles Dixon <chvckd@gmail.com>

error.go

@@ -534,6 +534,17 @@ func IsDurabilityImpossibleError(err error) bool {
 	return false
 }
 
+// IsSyncWriteReCommitInProgressError verifies whether or not the cause for an error is because of an
+// attempt to mutate a key which has a SyncWrite recommit pending. Client should retry, possibly with backoff.
+func IsSyncWriteReCommitInProgressError(err error) bool {
+	cause := errors.Cause(err)
+	if kvErr, ok := cause.(KeyValueError); ok && kvErr.KeyValueError() {
+		return kvErr.StatusCode() == int(gocbcore.StatusSyncWriteReCommitInProgress)
+	}
+
+	return false
+}
+
 // IsSyncWriteInProgressError verifies whether or not the cause for an error is because of an
 // attempt to mutate a key which has a SyncWrite pending. Client should retry, possibly with backoff.
 func IsSyncWriteInProgressError(err error) bool {