rollback childprocess version to work with shell

Gemfile

@@ -53,7 +53,7 @@ gem 'charlock_holmes'
 gem 'rake'
 gem 'foreman'
 gem 'jquery-rails'
-gem 'childprocess'
+gem 'childprocess', '0.3.6'
 gem 'gitlab_ci_meta'
 group :assets do

Gemfile.lock

@@ -44,8 +44,8 @@ GEM
       facter (>= 1.6.12)
       timers (>= 1.0.0)
     charlock_holmes (0.6.9)
-    childprocess (0.3.9)
-      ffi (~> 1.0, >= 1.0.11)
+    childprocess (0.3.6)
+      ffi (~> 1.0, >= 1.0.6)
     chronic (0.9.0)
     coderay (1.0.8)
     coffee-rails (3.2.2)
@@ -246,7 +246,7 @@ DEPENDENCIES
   bootstrap-sass
   capybara
   charlock_holmes
-  childprocess
+  childprocess (= 0.3.6)
   coffee-rails (~> 3.2.1)
   coveralls
   devise

db/seeds.rb

@@ -40,11 +40,11 @@ if Rails.env == 'development'
     name: "Six",
     scripts: 'bundle exec rspec spec'
-  project.repo.commits('master', 20).each_with_index do |commit, index|
+  project.repo.walk('1c8a9df45').first(10).each_with_index do |commit, index|
     build = project.register_build(
       ref: 'master',
-      before: commit.parents.first.id,
-      after: commit.id
+      before: commit.parents.first.oid,
+      after: commit.oid
     )
     Runner.perform_in(index.minutes, build.id)