[PATCH] fix cacheReq ts_min/ts_max calculation. BZ 1039028

[James Antill]

On Fri, 2013-12-06 at 16:16 +0100, Zdenek Pavlas wrote:
> Don't use repo.metadata_cookie since it runs dirSetup()
> and we don't want to create cachedir for disabled repo.

 I'm 99% sure this should just use self.repos.listEnabled() instead.
Just confused about why I didn't do that initially.