Disregard hidden files in repositories folder when getting all repositories

Change-Id: Ib552ff02ce41c11ac69e2c594272d26620fe5d39
Reviewed-on: https://q.tasktop.com/alm/s/c2c-oss/gerrit/89
Tested-by: Hudson
Reviewed-by: Myles Feichtinger <myles.feichtinger@tasktop.com>
Tested-by: Myles Feichtinger <myles.feichtinger@tasktop.com>