update cloud test running to use java17 by default

Author: zhongkechen

examples/src/test/java/software/amazon/lambda/durable/examples/CloudBasedIntegrationTest.java

@@ -57,7 +57,7 @@ static void setup() {
 
         account = System.getProperty("test.aws.account");
         region = System.getProperty("test.aws.region");
-        functionNameSuffix = System.getProperty("test.function.name.suffix", "");
+        functionNameSuffix = System.getProperty("test.function.name.suffix", "-java17");
 
         if (account == null || region == null) {
             try (var sts = StsClient.create()) {