Fix for tox 2.x
Fix for tox 2.x

Tox 2.x does not parse the current tox file as is, the comments cause
"ValueError: No closing quotation". Remove the comments to make the file
work with recent tox.

This is caused by a backwards incompatible change in tox:
https://bitbucket.org/hpk42/tox/issues/181

Closes-Bug: #1527562
Change-Id: I2a12093dcb3207be1a888445ec59e1b7da849852

stackforge/devstack-plugin-sheepdog