[Commotion-admin] [luci-commotion] Reject ssh changes with invalid root password (#170)

[areynold]

Closes #155 

To test:
1. Open Administration > Advanced > System > Administration in a web browser
2. SSH into the node and run `uci show dropbear`
3. Using an incorrect/blank root password, change a number of settings on the page, including ssh keys.
4. Click Save, then run `uci show dropbear` from the command line. The settings should not have changed. If you added an ssh key, it should not have been added to /etc/dropbear/authorized_keys.
5. Repeat using an incorrect root password and Save & Apply instead of Save. Your settings should not appear in /etc/config/dropbear.
6. Enter the correct root password and repeat. Your new settings should have been saved.
You can merge this Pull Request by running:

  git pull https://github.com/opentechinstitute/luci-commotion validate-password

Or you can view, comment on it, or merge it online at:

  https://github.com/opentechinstitute/luci-commotion/pull/170

-- Commit Summary --

  * Updating admin.lua patch to honor password validation across maps
  * Updated patch -p flag for admin.oldpasswd.patch
  * Re-implementing admin password patch

-- File Changes --

    M files/usr/share/commotion/patches/admin.oldpasswd.patch (71)

-- Patch Links --

https://github.com/opentechinstitute/luci-commotion/pull/170.patch
https://github.com/opentechinstitute/luci-commotion/pull/170.diff

---
Reply to this email directly or view it on GitHub:
https://github.com/opentechinstitute/luci-commotion/pull/170
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