feat(hdfs): enable Kerberos authentication for HDFS services in test configuration

- Updated `spring-bigdata-test.toml` to set `kerberos` and `hdfsKerberos` to `true` for enabling HDFS Kerberos authentication.

Author: CoderYellow

example/spring-gradle-plugin/src/main/resources/spring-bigdata-test.toml

@@ -1,6 +1,6 @@
 [services]
-kerberos = false
-hdfsKerberos = false
+kerberos = true
+hdfsKerberos = true
 hdfs = true
 hiveMetastore = false
 clouderaHms = true