Use excuses_suffix instead of name for items

At the moment, the two are identical, but they are not intended to
remain identical (i.e. the name should eventually become the full
suite name).

Signed-off-by: Niels Thykier <niels@thykier.net>

britney.py

@@ -1632,11 +1632,11 @@ class Britney(object):
                 if pkg in sources_t:
                     for arch in architectures:
                         if should_upgrade_srcarch(pkg, arch, suite.name):
-                            upgrade_me_add("%s/%s_%s" % (pkg, arch, suite.name))
+                            upgrade_me_add("%s/%s_%s" % (pkg, arch, suite.excuses_suffix))
 
                 # check if the source package should be upgraded
                 if should_upgrade_src(pkg, suite.name):
-                    upgrade_me_add("%s_%s" % (pkg, suite.name))
+                    upgrade_me_add("%s_%s" % (pkg, suite.excuses_suffix))
 
         # process the `remove' hints, if the given package is not yet in upgrade_me
         for hint in self.hints['remove']: