DIRACGrid/DIRAC — pull request #921 by zmathe (2012-08-24 10:34:23+00:00)
Title: The following methods are implemented:

1.) A method which return the sites grouped by the Tier level did not
existed. The MoUTierLevel is used to build a dictionary which key is
the MoUTierLevel (Tier0, Tier1, etc).
2.) In addition a new method implemented which iterates on the Tier2
sites and checks the attached SEs and builds a dictionary which key is
a Tier1 site and value is the attached Tier2.
3.) Using the SiteLocalSEMapping the method returns the T1 with the
associated T2 sites.