Create a flatfile based shareable websession cache

The plugin replaces the builtin Gerrit WebSession implementation
with one that uses a flat file based cache at the location specified
in 'etc/gerrit.config' by the "plugin.websession-flatfile.directory"
entry.

Change-Id: I92afcf917b2e0f12cb5002067c7448ad5bac6112
11 files changed
tree: a2a1bc3aefe7e487fc8e93b778b0286b87b43db0
  1. .settings/
  2. src/
  3. .gitignore
  4. BUCK
  5. LICENSE