Fix running job as different user

Upstart is losing track of the process, when running from a wrapper script,
created by the gradle application plugin
(https://docs.gradle.org/current/userguide/application_plugin.html).

Fixed as described in the upstart cookbook
(http://upstart.ubuntu.com/cookbook/#run-a-job-as-a-different-user).

Author: rake5k

templates/service/upstart.conf.j2

@@ -16,7 +16,7 @@
 
 description "{{ deploy_service_description }}"
 author "https://github.com/acme-software/ansible-java-deployment"
-version 1.0.1
+version 1.0.2
 
 # Respawn parameters with limit: dies 3 times within 60 seconds
 respawn
@@ -47,7 +47,7 @@ end script
 {% endif %}
 
 # Execute deploy_service_start_command and log stdout
-exec su -s /bin/sh -c '{{ deploy_service_start_command }} {% if deploy_log_stdout == True %}1>>{{ deploy_log_stdout_path }}{% endif %} {% if deploy_log_stderr == True %}2>>{{ deploy_log_stderr_path }}{% endif %}' {{ deploy_app_user }}
+exec su -s /bin/sh -c 'exec "$0" "$@" {% if deploy_log_stdout == True %}1>>{{ deploy_log_stdout_path }}{% endif %} {% if deploy_log_stderr == True %}2>>{{ deploy_log_stderr_path }}{% endif %}' {{ deploy_app_user }} -- {{ deploy_service_start_command }} -b wibble
 
 {% if deploy_service_has_prestop_script == True %}
 # Pre-Stop Script