Replace commits calendar with contributions calendar

* count opening of issues and merge requests
* dont trigger git repository - use events from database
* much-much faster since does not affected by repository size
Status Job ID Name Coverage
  Test
passed #15827
Brakeman

00:00:51

passed #15825
Jasmine

00:01:16

failed #15824
Rspec

00:28:26

passed #15826
Rubocop

00:00:36

passed #15823
Spinach

00:15:49

 
Name Stage Failure
failed
Rspec Test There is an unknown failure, please try again
rspec ./spec/models/repository_spec.rb:54 # Repository commits_by_user_on_date_log single e-mail for user contains the exepected commits
Coverage report generated for RSpec to /home/gitlab-runner/tmp/builds/project-1/coverage. 10458 / 12858 LOC (81.33%) covered.
rake aborted!
["rspec", "spec"] failed!
/home/gitlab-runner/tmp/builds/project-1/lib/tasks/spinach.rake:38:in `block in run_commands'
/home/gitlab-runner/tmp/builds/project-1/lib/tasks/spinach.rake:37:in `each'
/home/gitlab-runner/tmp/builds/project-1/lib/tasks/spinach.rake:37:in `run_commands'
/home/gitlab-runner/tmp/builds/project-1/lib/tasks/spec.rake:38:in `block in <top (required)>'
Tasks: TOP => spec
(See full trace by running task with --trace)