Release Apache Kudu 1.18.1

[docs] Update 1.18.1 release notes

Change-Id: I0761df2f62661a3e44cdbd26e1ed3ba8b07aa102
Reviewed-on: http://gerrit.cloudera.org:8080/23752
Tested-by: Kudu Jenkins
Reviewed-by: Alexey Serbin <alexey@apache.org>

[examples] Bump Kudu version to 1.18.1 for examples

Change-Id: I37e9a08930d5434450611fb90f54526f8c13afee
Reviewed-on: http://gerrit.cloudera.org:8080/23393
Reviewed-by: Alexey Serbin <alexey@apache.org>
Tested-by: Abhishek Chennaka <achennaka@cloudera.com>

Release Apache Kudu 1.18.0

[examples] Bump Kudu version to 1.18.0 for examples

Change-Id: I6e7fcb482e16e01bd2cd8869ee3463a3c2e55370
Reviewed-on: http://gerrit.cloudera.org:8080/23091
Reviewed-by: Alexey Serbin <alexey@apache.org>
Tested-by: Abhishek Chennaka <achennaka@cloudera.com>

Release Apache Kudu 1.17.1

[docs] Update release notes for 1.17.1

Change-Id: Id754799a3858580f19d66c2eb96b6769b8b9c95a
Reviewed-on: http://gerrit.cloudera.org:8080/22004
Reviewed-by: Alexey Serbin <alexey@apache.org>
Tested-by: Abhishek Chennaka <achennaka@cloudera.com>

[docs] Add section header for release notes

Change-Id: I73d86c77fb553a5063ab78f6513a1fe24329367c
Reviewed-on: http://gerrit.cloudera.org:8080/21963
Tested-by: Kudu Jenkins
Reviewed-by: Alexey Serbin <alexey@apache.org>

[examples] Bump Kudu version to 1.17.1 for examples

Change-Id: I0a6f5e8754e59b6a64db853ef955b83fb39d6294
Reviewed-on: http://gerrit.cloudera.org:8080/21901
Tested-by: Kudu Jenkins
Reviewed-by: Alexey Serbin <alexey@apache.org>

Release Apache Kudu 1.17.0