Various fixes to Spyglass to resolve tox errors
The tox configuration needs to be updated in order for it to be helpful
for Zuul. This change makes some minor modifications to the tox config
to improve its usability and uniformity with other Open Stack configs.
Makes bare minimum changes for pep8 tests compliance.
Adds gate scripts for white space linting.
In the future, additional changes will need to be made to add tests to
Spyglass. These changes will need to enable the 'py36' and 'cover' tox
env and set coverage levels. Additional linting should also be
performed to improve Spyglass code readability and organization.