update schema

db/schema.rb

@@ -182,8 +182,8 @@ ActiveRecord::Schema.define(version: 20160615142710) do
     t.text     "artifacts_metadata"
     t.integer  "erased_by_id"
     t.datetime "erased_at"
-    t.string   "environment"
     t.datetime "artifacts_expire_at"
+    t.string   "environment"
   end
 
   add_index "ci_builds", ["commit_id", "stage_idx", "created_at"], name: "index_ci_builds_on_commit_id_and_stage_idx_and_created_at", using: :btree
@@ -434,7 +434,7 @@ ActiveRecord::Schema.define(version: 20160615142710) do
   add_index "emails", ["user_id"], name: "index_emails_on_user_id", using: :btree
 
   create_table "environments", force: :cascade do |t|
-    t.integer  "project_id"
+    t.integer  "project_id", null: false
     t.string   "name",       null: false
     t.datetime "created_at"
     t.datetime "updated_at"
@@ -886,8 +886,6 @@ ActiveRecord::Schema.define(version: 20160615142710) do
     t.boolean  "merge_requests_enabled",             default: true,  null: false
     t.boolean  "wiki_enabled",                       default: true,  null: false
     t.integer  "namespace_id"
-    t.string   "issues_tracker",                   default: "gitlab", null: false
-    t.string   "issues_tracker_id"
     t.boolean  "snippets_enabled",                   default: true,  null: false
     t.datetime "last_activity_at"
     t.string   "import_url"