Elasticsearch integration

Valery Sizovrequested to merge
elasticsearch into master

https://gitlab.com/gitlab-org/gitlab-ee/issues/61

Steps:

  • Base integration
  • Implement snippet search (service lawyer and actual search)
  • Implement project search (service lawyer and actual search)
  • Implement global search (service lawyer and actual search)
  • Implement search through the notes
  • Implement search through the milestones
  • Implement search though the wiki blobes
  • Implement search though the commits and code
  • Specs and Spinach (fix)
  • Specs and Spinach (new ones)
  • Take care of omnibus support for elasticsearch
  • Documentation
  • Add elasticsearch check to GitLab check
  • Update and create index means

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