Add logrotate for proxy systems

Added rsyslog logrotate cong for proxy systems and a task land the
configs as well as fix some yamllint errors.

files/common/rsyslog-logrotate

@@ -0,0 +1,20 @@
+/var/log/cron
+/var/log/maillog
+/var/log/messages
+/var/log/secure
+/var/log/spooler
+{
+    missingok
+    sharedscripts
+    postrotate
+        /usr/bin/systemctl reload rsyslog.service >/dev/null 2>&1 || true
+    endscript
+    daily
+    rotate 7
+    ifempty
+    compress
+    compresscmd /usr/bin/xz
+    uncompresscmd /usr/bin/xz
+    compressext .xz
+    dateext
+}