corrects invalid logrotate option maxsize

- logrotate does not have a maxsize option.
  while logrotate supports a minsize option its
  couterpart is size.
- This chage replaces the use of maxsize with size
  in cron-logrotate-global.conf.j2

Change-Id: I381c52e8a866b74b5f2c3b38a2c87f74c48c05e1
Closes-Bug: #1640196

ansible/roles/common/templates/cron-logrotate-global.conf.j2

@@ -14,7 +14,7 @@ missingok
 
 minsize 30M
 
-maxsize 100M
+size 100M
 
 su root kolla