Fix migrations

db/migrate/20150924125150_add_project_id_to_ci_commit.rb

+class AddProjectIdToCiCommit < ActiveRecord::Migration
+  def up
+    add_column :ci_commits, :gl_project_id, :integer
+  end
+end

db/migrate/20150924125150_add_project_id_to_ci_tables.rb

-class AddProjectIdToCiTables < ActiveRecord::Migration
-  def up
-    add_column :ci_builds, :gl_project_id, :integer
-    add_column :ci_commits, :gl_project_id, :integer
-    add_column :ci_events, :gl_project_id, :integer
-    add_column :ci_runner_projects, :gl_project_id, :integer
-    add_column :ci_services, :gl_project_id, :integer
-    add_column :ci_triggers, :gl_project_id, :integer
-    add_column :ci_variables, :gl_project_id, :integer
-    add_column :ci_web_hooks, :gl_project_id, :integer
-  end
-end

db/migrate/20150924125436_migrate_project_id_for_ci_commits.rb

+class MigrateProjectIdForCiCommits < ActiveRecord::Migration
+  def up
+    execute(
+      "UPDATE ci_commits " +
+        "JOIN ci_projects ON ci_projects.id = ci_commits.project_id " +
+        "SET gl_project_id=ci_projects.gitlab_id " +
+        "WHERE gl_project_id IS NULL"
+    )
+  end
+end

db/migrate/20150924125436_migrate_project_id_for_ci_tables.rb

-class MigrateProjectIdForCiTables < ActiveRecord::Migration
-  TABLES = %w(ci_builds ci_commits ci_events ci_runner_projects
-    ci_services ci_triggers ci_variables ci_web_hooks)
-
-  def up
-    TABLES.each do |table|
-      execute(
-        "UPDATE #{table} " +
-          "JOIN ci_projects ON ci_projects.id = #{table}.project_id " +
-          "SET gl_project_id=ci_projects.gitlab_id " +
-          "WHERE gl_project_id IS NULL"
-      )
-    end
-  end
-end

db/migrate/20150924131004_add_ci_fields_to_projects_table.rb

-class AddCiFieldsToProjectsTable < ActiveRecord::Migration
-  def up
-    add_column :projects, :shared_runners_enabled, :boolean, default: false
-  end
-end