Combine post-deploy and post-rollback

test/integration/docker/deployer/app/.mrsk/hooks/post-rollback

@@ -1,3 +0,0 @@
-#!/bin/sh
-echo "Rolled back!"
-mkdir -p /tmp/${TEST_ID} && touch /tmp/${TEST_ID}/post-rollback

test/integration/main_test.rb

@@ -17,7 +17,7 @@ class MainTest < IntegrationTest
     assert_hooks_ran "pre-build", "post-deploy"
 
     mrsk :rollback, first_version
-    assert_hooks_ran "post-rollback"
+    assert_hooks_ran "post-deploy"
     assert_app_is_up version: first_version
 
     details = mrsk :details, capture: true