Update fixtures location to use stackforge.
Update fixtures location to use stackforge.

Updates the .fixtures.yml file so that it uses stackforge
for relevant projects.

Change-Id: I4b0a87ec3bb2c3ae52cba79f4ac58f01c72273f6

aimonb/puppet-glance,aquto/puppet-glance,mjeanson/puppet-glance,varunarya10/puppet-glance,TelekomCloud/puppet-glance,gwdg/puppet-glance,aquto/puppet-glance,TelekomCloud/puppet-glance,mjeanson/puppet-glance,varunarya10/puppet-glance,aimonb/puppet-glance,gwdg/puppet-glance