alertmanager: fix container name in amtool wrapper

Signed-off-by: Jakub Sokołowski <jakub@status.im>

tasks/main.yml

@@ -1,6 +1,6 @@
 ---
-#- include_tasks: consul.yml
+- include_tasks: consul.yml
 - include_tasks: discover.yml
 - include_tasks: config.yml
 - include_tasks: container.yml
-#- include_tasks: wrapper.yml
+- include_tasks: wrapper.yml

tasks/wrapper.yml

@@ -3,6 +3,6 @@
   copy:
     content: |
       #/usr/bin/env bash
-      docker exec alertmanager amtool $@
+      docker exec {{ alertmanager_service_name }}-app amtool $@
     dest: '/usr/local/bin/amtool'
     mode: 0755