Express ports as strings to silence warning
Express ports as strings to silence warning

Without this change, running `vagrant up` (with the `security` role) on
Ansible 2.8 will give warnings:

     [WARNING]: The value 22 (type int) in a string field was converted to '22'
    (type string). If this does not look like what you expect, quote the entire
    value to ensure it does not change.

     [WARNING]: The value 80 (type int) in a string field was converted to '80'
    (type string). If this does not look like what you expect, quote the entire
    value to ensure it does not change.

     [WARNING]: The value 443 (type int) in a string field was converted to '443'
    (type string). If this does not look like what you expect, quote the entire
    value to ensure it does not change.

jcalazan/ansible-django-stack,YPCrumble/ansible-django-stack,jcalazan/ansible-django-stack,jcalazan/ansible-django-stack,YPCrumble/ansible-django-stack,YPCrumble/ansible-django-stack