Update repoinfo.conf for F-14 branch

[James Laska]

Greetings,

Per ticket#211, I have updated repoinfo.conf for the new F-14 branch.  Instructions for
updating repoinfo.conf are on the wiki at
https://fedoraproject.org/wiki/How_to_update_AutoQA_repoinfo.conf.  I have tested this
change and confirmed that watch-koji-builds.py goes from monitoring these repos:

    Looking for builds with tags dist-f10-updates-candidate
        dist-f11-updates-candidate dist-f12-updates-candidate
        dist-f13-updates-candidate dist-f14

To monitoring for koji builds in these repos:

    Looking for builds with tags dist-f10-updates-candidate
        dist-f11-updates-candidate dist-f12-updates-candidate
        dist-f13-updates-candidate dist-f14-updates-candidate dist-f15

Thanks,
James