Havana: Fixtures: fix keystone branch name

Solve issue: « fatal: ambiguous argument 'stable/havana': unknown
revision or path not in the working tree. »

Change-Id: I1752c19bfd18b26ea0ad4ad0b8d464c5a86b7261
Merge "Havana: Fixtures: fix keystone branch name" into stable/havana
Merge branch 'stable/havana' of https://github.com/stackforge/puppet-neutron into havana

Conflicts:
	.fixtures.yml