Implement 'Pure Revert' REST endpoint

In some cases, users want to find out if a change is a pure revert of
some other change. A change is a pure revert of another change, if it
just reverts the change and performs no additional content
modifications.

This commit adds a new REST endpoint that can be called on a change
resource and given an optional commit SHA1 as query parameter to check
against. If the parameter is omitted, the change is checked
against the reference of 'revertOf' if it exists.

Change-Id: Ia2ce051afe7d24aed688bfa3d8bbd1cb8fe4a200
7 files changed
tree: df45ac0576d6ce4ec2887e0657c0efe7e2add0be
  1. .settings/
  2. contrib/
  3. Documentation/
  4. gerrit-acceptance-framework/
  5. gerrit-acceptance-tests/
  6. gerrit-cache-h2/
  7. gerrit-common/
  8. gerrit-elasticsearch/
  9. gerrit-extension-api/
  10. gerrit-gpg/
  11. gerrit-gwtdebug/
  12. gerrit-gwtexpui/
  13. gerrit-gwtui/
  14. gerrit-gwtui-common/
  15. gerrit-httpd/
  16. gerrit-index/
  17. gerrit-launcher/
  18. gerrit-lucene/
  19. gerrit-main/
  20. gerrit-oauth/
  21. gerrit-openid/
  22. gerrit-patch-commonsnet/
  23. gerrit-patch-jgit/
  24. gerrit-pgm/
  25. gerrit-plugin-api/
  26. gerrit-plugin-gwtui/
  27. gerrit-prettify/
  28. gerrit-reviewdb/
  29. gerrit-server/
  30. gerrit-sshd/
  31. gerrit-test-util/
  32. gerrit-util-cli/
  33. gerrit-util-http/
  34. gerrit-util-ssl/
  35. gerrit-war/
  36. lib/
  37. plugins/
  38. polygerrit-ui/
  39. ReleaseNotes/
  40. tools/
  41. website/
  42. .bazelproject
  43. .editorconfig
  44. .git-blame-ignore-revs
  45. .gitignore
  46. .gitmodules
  47. .mailmap
  48. .pydevproject
  49. BUILD
  50. COPYING
  51. fake_pom.xml
  52. INSTALL
  53. README.md
  54. SUBMITTING_PATCHES
  55. version.bzl
  56. WORKSPACE
README.md

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