Appveyor broken on redis install

Build started
git clone -q https://github.com/openzipkin/zipkin-js.git C:\projects\zipkin-js
git fetch -q origin +refs/pull/193/merge:
git checkout -qf FETCH_HEAD
Running Install scripts
choco install redis
Chocolatey v0.10.8
Installing the following packages:
redis
By installing you accept licenses for the packages.
Progress: Downloading redis 2.4.6.1... 100%
redis v2.4.6.1 [Approved]
redis package files install completed. Performing other installation steps.
Downloading redis 64 bit
  from 'http://ruilopes.com/redis-setup/binaries/redis-2.4.6-setup-64-bit.exe'
Progress: 100% - Completed download of C:\Users\appveyor\AppData\Local\Temp\1\chocolatey\redis\2.4.6.1\redis-2.4.6-setup-64-bit.exe (796.51 KB).
Download of redis-2.4.6-setup-64-bit.exe (796.51 KB) completed.
WARNING: Missing package checksums are not allowed (by default for HTTP/FTP, 
 HTTPS when feature 'allowEmptyChecksumsSecure' is disabled) for 
 safety and security reasons. Although we strongly advise against it, 
 if you need this functionality, please set the feature 
 'allowEmptyChecksums' ('choco feature enable -n 
 allowEmptyChecksums') 
 or pass in the option '--allow-empty-checksums'. You can also pass 
 checksums at runtime (recommended). See choco install -? for details.
The integrity of the file 'redis-2.4.6-setup-64-bit.exe' from 'http://ruilopes.com/redis-setup/binaries/redis-2.4.6-setup-64-bit.exe' has not been verified by a checksum in the package scripts.
Do you wish to allow the install to continue (not recommended)?
[Y] Yes [N] No (default is "N")
  Confirmation (`-y`) is set.
  Respond within 30 seconds or the default selection will be chosen.
ERROR: Empty checksums are no longer allowed by default for non-secure sources. Please ask the maintainer to add checksums to this package. In the meantime if you need this package to work correctly, please enable the feature allowEmptyChecksums, provide the runtime switch '--allow-empty-checksums', or pass in checksums at runtime (recommended - see 'choco install -?' / 'choco upgrade -?' for details). It is strongly advised against allowing empty checksums for non-internal HTTP/FTP sources.
The install of redis was NOT successful.
Error while running 'C:\ProgramData\chocolatey\lib\redis\tools\chocolateyInstall.ps1'.
 See log for details.
Chocolatey installed 0/1 packages. 1 packages failed.
 See the log for details (C:\ProgramData\chocolatey\logs\chocolatey.log).
Failures
 - redis (exited -1) - Error while running 'C:\ProgramData\chocolatey\lib\redis\tools\chocolateyInstall.ps1'.
 See log for details.

[codefromthecrypt]

added to tooling as this is in need of TLC. Basically appveyor has been busted a very long time cc @abesto @jcchavezs

[abesto]

More tests (or test envs) are a Good Thing ™. The only concern I can raise is checking whether this is worth spending time on. You’d know better than me if this would’ve caught problems that hit zipkin-js consumers since it was disabled.