chore: new owl bot post processor docker image (#545)

gcr.io/repo-automation-bots/owlbot-java:latest@sha256:ee698481139bf3df35cd83d2f17f9670ee914d6184f8909a81d672a6abaf0e72

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

.github/.OwlBot.lock.yaml

@@ -1,3 +1,3 @@
 docker:
-  digest: sha256:e09db16aef633f4cae68b6eb2771b40ea01464f8db08badcd1c5197b9c623457
   image: gcr.io/repo-automation-bots/owlbot-java:latest
+  digest: sha256:ee698481139bf3df35cd83d2f17f9670ee914d6184f8909a81d672a6abaf0e72

.kokoro/build.sh

@@ -23,8 +23,8 @@ cd ${scriptDir}/..
 # include common functions
 source ${scriptDir}/common.sh
 
-# Print out Java version
-java -version
+# Print out Maven & Java version
+mvn -version
 echo ${JOB_TYPE}
 
 # attempt to install 3 times with exponential backoff (starting with 10 seconds)