Add task to upgrade to version 1.0.0

It includes every task needed for the upgrade.

lib/tasks/consul.rake

@@ -0,0 +1,13 @@
+namespace :consul do
+  desc "Runs tasks needed to upgrade to the latest version"
+  task execute_release_tasks: "execute_release_1.0.0_tasks"
+
+  desc "Runs tasks needed to upgrade from 1.0.0-beta to 1.0.0"
+  task "execute_release_1.0.0_tasks": [
+    "poll:generate_slugs",
+    "stats_and_results:migrate_to_reports",
+    "budgets:calculate_ballot_lines",
+    "settings:remove_deprecated_settings",
+    "stats:generate"
+  ]
+end