Flake8 update - library/glance
Flake8 update - library/glance

This update fixes issues with linting such that it can now pass
OpenStack hacking/flake8 checks.

Change-Id: I9a103b92717222ddfe34d222545c5d198b6d9a7f
Partial-Bug: 1440462

mrda/openstack-ansible,yanyao/openstack-deployment,yanyao/openstack-deployment,major/os-ansible-deployment,git-harry/os-ansible-deployment,sigmavirus24/os-ansible-deployment,sacharya/os-ansible-deployment,manuelfelipe/openstack-ansible,Logan2211/openstack-ansible,pombredanne/os-ansible-deployment,VaneCloud/openstack-ansible,d34dh0r53/os-ansible-deployment,manuelfelipe/openstack-ansible,AlphaStaxLLC/os-ansible-deployment,Logan2211/openstack-ansible,open-switch/infra_openstack-ansible,cfarquhar/openstack-ansible,yanyao/openstack-deployment-liberty,jpmontez/openstack-ansible,BjoernT/openstack-ansible,wenhuizhang/os-ansible-deployment,yanyao/openstack-deployment-liberty,VaneCloud/openstack-ansible,jpmontez/openstack-ansible,mrda/openstack-ansible,stackforge/os-ansible-deployment,metral/os-ansible-deployment,jpmontez/os-ansible-deployment,open-switch/infra_openstack-ansible,yanyao/openstack-ansible,mancdaz/openstack-ansible,mancdaz/openstack-ansible,dhanunjaya/os-ansible-deployment,BjoernT/openstack-ansible,major/openstack-ansible,open-switch/infra_openstack-ansible,robb-romans/openstack-ansible,os-cloud/os-ansible-deployment,AlphaStaxLLC/os-ansible-deployment,AlphaStaxLLC/os-ansible-deployment,major/os-ansible-deployment,achekunov/openstack-ansible,pombredanne/os-ansible-deployment,miguelgrinberg/os-ansible-deployment,sti-jans/openstack-ansible,yanyao/openstack-ansible,cfarquhar/openstack-ansible,openstack/openstack-ansible,sacharya/os-ansible-deployment,achekunov/openstack-ansible,d34dh0r53/os-ansible-deployment,sigmavirus24/os-ansible-deployment,git-harry/os-ansible-deployment,manuelfelipe/openstack-ansible,cloudnull/os-ansible-deployment,BjoernT/os-ansible-deployment,wenhuizhang/os-ansible-deployment,yanyao/openstack-deployment-liberty,openstack/openstack-ansible,shane-c/openstack-ansible,achekunov/openstack-ansible,BjoernT/os-ansible-deployment,metral/os-ansible-deployment,VaneCloud/openstack-ansible,antonym/openstack-ansible,mrda/openstack-ansible,shane-c/openstack-ansible,sti-jans/openstack-ansible,jpmontez/openstack-ansible,jpmontez/os-ansible-deployment,pombredanne/os-ansible-deployment,yanyao/newton,bunchc/openstack-ansible,weezer/openstack-ansible,yanyao/openstack-deployment,shane-c/openstack-ansible,yanyao/openstack-deployment,yanyao/newton,bunchc/openstack-ansible,dhanunjaya/os-ansible-deployment,antonym/openstack-ansible,os-cloud/os-ansible-deployment,git-harry/os-ansible-deployment,miguelgrinberg/os-ansible-deployment,sigmavirus24/openstack-ansible,sigmavirus24/openstack-ansible,robb-romans/openstack-ansible,cloudnull/os-ansible-deployment,weezer/openstack-ansible,jpmontez/os-ansible-deployment,antonym/openstack-ansible,major/openstack-ansible,BjoernT/os-ansible-deployment,sti-jans/openstack-ansible,stackforge/os-ansible-deployment