Update checkstyle to 8.10

- fix issues detected
  - YANG custom registrator should be subject to checkstyle
  - fix Java 8 syntax related violations

Change-Id: I0fc52c6612a40d851fd9bc3bf019621776b1f92a
1 file changed
tree: 90054c4d9d6c6eceb6395fa46392f14ce697de03
  1. BUCK
  2. app/
  3. pom.xml
  4. web/