Use systemd for managing service.

@see commit a889546
@see https://www.freedesktop.org/software/systemd/man/systemd.service.html
@see https://www.freedesktop.org/software/systemd/man/systemd.directives.html
@see http://docs.spring.io/spring-boot/docs/1.3.x/reference/html/deployment-install.html#deployment-systemd-service
@see http://journal.thobe.org/2013/02/jvms-and-kill-signals.html

A couple of links about unsecure behavior of the default init-script:
@see https://habrahabr.ru/post/275203/ (in Russian)
@see spring-projects/spring-boot#4935

Addressed to #399

[ci skip]

Author: php-coder

vagrant/provisioning/roles/mystamps-app/files/mystamps.conf

@@ -0,0 +1,13 @@
+[Unit]
+Description = MyStamps site
+After = syslog.target
+
+[Service]
+User = mystamps
+WorkingDirectory = /data/mystamps
+EnvironmentFile = /data/mystamps/mystamps.conf
+ExecStart = /usr/bin/java $JAVA_OPTS -jar /data/mystamps/mystamps.war
+SuccessExitStatus = 143
+
+[Install]
+WantedBy = multi-user.target

vagrant/provisioning/roles/mystamps-app/files/mystamps.service

@@ -1,5 +1,10 @@
 ---
 
+# TODO: use systemd module (requires ansible 2.2+)
+- name: Reloading systemd service
+  command:
+    systemctl daemon-reload
+
 - name: Restarting mystamps service
   service:
     name: mystamps

vagrant/provisioning/roles/mystamps-app/handlers/main.yml

@@ -12,11 +12,28 @@
   notify:
   - Restarting mystamps service
 
-- name: Creating init-script
-  file:
-    src: /data/mystamps/mystamps.war
-    dest: /etc/init.d/mystamps
-    state: link
+- name: Creating mystamps.conf
+  template:
+    src: mystamps.conf
+    dest: /data/mystamps/mystamps.conf
+    force: yes
+    backup: no
+    owner: mystamps
+    group: mystamps
+    mode: '0644'
+  notify:
+  - Restarting mystamps service
+
+- name: Creating mystamps.service
+  copy:
+    src: mystamps.service
+    dest: /etc/systemd/system/mystamps.service
+    owner: root
+    group: root
+    mode: '0644'
+  notify:
+  - Reloading systemd service
+  - Restarting mystamps service
 
 - name: Creating /data/logs
   file:
@@ -26,18 +43,17 @@
     mode: '0755'
     state: directory
 
-- name: Creating /data/uploads
+- name: Creating /data/heap-dumps
   file:
-    path: /data/uploads
+    path: /data/heap-dumps
     owner: mystamps
     group: mystamps
     mode: '0755'
     state: directory
-  when: profile == 'prod'
 
-- name: Creating /data/heap-dumps
+- name: Creating /data/uploads
   file:
-    path: /data/heap-dumps
+    path: /data/uploads
     owner: mystamps
     group: mystamps
     mode: '0755'
@@ -66,24 +82,6 @@
   - Restarting mystamps service
   when: profile == 'prod'
 
-- name: Creating mystamps.conf
-  copy:
-    src: mystamps.conf
-    dest: /data/mystamps/mystamps.conf
-    mode: '0644'
-  notify:
-  - Restarting mystamps service
-  when: profile == 'prod'
-
-- name: Creating /var/log/mystamps
-  file:
-    path: /var/log/mystamps
-    owner: mystamps
-    group: mystamps
-    mode: '0755'
-    state: directory
-  when: profile == 'prod'
-
 - name: Running service
   service:
     name: mystamps

vagrant/provisioning/roles/mystamps-app/tasks/main.yml

@@ -0,0 +1,3 @@
+# This file is being read and used by /etc/systemd/system/mystamps.service
+SPRING_PROFILES_ACTIVE={{ profile }}
+JAVA_OPTS=-XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/data/heap-dumps -XX:+UseCompressedOops -Dsun.rmi.dgc.client.gcInterval=86400000 -Dsun.rmi.dgc.server.gcInterval=86400000 -Djava.security.egd=file:/dev/./urandom -Xmx128m