Fix for the directory inventory source where depth information on the group was being discarded

due to initial copy.  New model will reuse the first object and copy attributes on the second.

lib/ansible/inventory/dir.py

@@ -62,15 +62,22 @@ class InventoryDirectory(object):
             # This takes a lot of code because we can't directly use any of the objects, as they have to blend
             for name, group in parser.groups.iteritems():
                 if name not in self.groups:
-                    self.groups[name] = Group(name)
-                for k, v in group.get_variables().iteritems():
-                    self.groups[name].set_variable(k, v)
+                    self.groups[name] = group
+                else:
+                    # group is already there, copy variables
+                    # note: depth numbers on duplicates may be bogus
+                    for k, v in group.get_variables().iteritems():
+                        self.groups[name].set_variable(k, v)
                 for host in group.get_hosts():
                     if host.name not in self.hosts:
-                        self.hosts[host.name] = Host(host.name)
-                    for k, v in host.vars.iteritems():
-                        self.hosts[host.name].set_variable(k, v)
+                        self.hosts[host.name] = host
+                    else:
+                        # host is already there, copy variables
+                        # note: depth numbers on duplicates may be bogus
+                        for k, v in host.vars.iteritems():
+                            self.hosts[host.name].set_variable(k, v)
                     self.groups[name].add_host(self.hosts[host.name])
+
             # This needs to be a second loop to ensure all the parent groups exist
             for name, group in parser.groups.iteritems():
                 for ancestor in group.get_ancestors():