getMethodUri

[Paul Nasrat]

I've changed UrlInstallMethod to return a list in the case where we are
doing loopback iso mounts on urls.  I was wondering if it would make
sense to make all getMethodUri calls to return lists?

Currently we have getPackagePaths which is documented with:

# modifies the uri from installmethod.getMethodUri() to take into
# account any installclass specific things including multiple base
# repositories.  takes a string, returns a list of strings

But it doesn't seem to return a list, we call items() on the resulting
dict instead.  We probably want one way of storing this in anaconda,
maybe name : [ ], so we don't have to do checking for ListType in
yuminstall.py.

Paul