fix error check

Author: salonichf5

tests/suite/graceful_recovery_test.go

@@ -282,10 +282,10 @@ func checkContainerLogsForErrors(ngfPodName string) {
 	Expect(err).ToNot(HaveOccurred())
 
 	for _, line := range strings.Split(logs, "\n") {
-		if *plusEnabled && strings.Contains(line, "[error]") {
+		if *plusEnabled && strings.Contains(line, "\"level\":\"error\"") {
 			Expect(line).To(ContainSubstring("Usage reporting must be enabled when using NGINX Plus"), line)
 		} else {
-			Expect(line).ToNot(ContainSubstring("[error]"), line)
+			Expect(line).ToNot(ContainSubstring("\"level\":\"error\""), line)
 		}
 	}
 }