Remove usage of java.util.Optional

Gerrit 2.13 uses java 7 so replace java optional by guava one. This
commit needs to be reverted when merging up to 2.14.

Change-Id: Iafed1431ea9aaa85d0441473d03d0ab0dc0cefd0
3 files changed
tree: da18635c49629247bbaa1e8059891eb9760a53c9
  1. .settings/
  2. lib/
  3. src/
  4. .buckconfig
  5. .gitignore
  6. BUCK
  7. LICENSE
  8. pom.xml