Preserve order of egg_info section in setup.cfg

egg_info is the dictionary with information that is injected
into setup.cfg. edit_config uses RawConfigParser which uses
collections.OrderedDict for all the data. Since we use a
simple dict(), when we loop through items in edit_config, we
see random behavior as a result the fields
tag_svn_revision/tag_date/tag_build are added to the setup.cfg
randomly. Let's add a OrderedDict to make it more predictable.

setuptools/command/egg_info.py

@@ -2,6 +2,7 @@
 
 Create a distribution's .egg-info directory and contents"""
 
+from collections import OrderedDict
 from distutils.filelist import FileList as _FileList
 from distutils.util import convert_path
 from distutils import log
@@ -67,7 +68,7 @@ def initialize_options(self):
 
     def save_version_info(self, filename):
         values = dict(
-            egg_info=dict(
+            egg_info=OrderedDict(
                 tag_svn_revision=0,
                 tag_date=0,
                 tag_build=self.tags(),