This patch includes some changes wrt StatelessSecurityGroupFixture:
- a task that cleans up the security groups generated with this fixture
is added to the tobiko-cleanup role
- when TOBIKO_PREVENT_CREATE env variable is set, the security groups
are not created (they should have been created before)
- the lockutils.synchronized decorator is used to avoid that two
security groups with the same name are created concurrently
- neutron.get_security_group(self.name) did not work because that method
does not work with the security group name; it is replaced by
neutron.list_security_groups(name=self.name) instead
Change-Id: I3ab84e138049a27db017630b32d81d290aa5f6cd
109802be5f