[BUG] 2017.7 win_iis.deployed does not update values

Description
win_iis.deployed does not update the values, if the site exists in IIS with some other configuration settings.

Setup
pillar:

  - siteName: 'mysite'
    sourcePath: 'C:\\inetpub\\mysite
    appPool: 'somepool'
    port: 81
    protocol: 'http'

salt:

add_{{ sites['siteName'] }}_site":
  win_iis.deployed:
    - name: {{ sites['siteName'] }}
    - sourcepath: {{ sites['sourcePath'] }}
    - apppool: {{ sites['appPool'] }}
    - port: {{ sites['port'] }}
    - protocol: {{ sites['protocol'] }}

Steps to Reproduce the behavior

1. Run the above state with some values.
2. Expect the site to be created.
3. Update port from 81 to 82 and rerun

Expected behavior
It should update the port for that site in IIS

Screenshots
Result: comment: Site already present: mysite

Versions Report
master version: 2017.7.4 (Nitrogen) - this is on Ubuntu
minions version: - 3002.5 - this is on windows