Fix deprecation warning when using python 2.7.13

Just invert the import order, try to get the real python 2 ConfigParser first.

Author: iMichka

CHANGELOG.md

@@ -17,6 +17,9 @@ Version 1.8.4
 
 2. Updated travis setup to python 3.6 for OS X.
 
+ * Fix deprecation warnings thrown by ```ConfigParser``` when using pygccxml
+   with python 2.7.13.
+
 Version 1.8.3
 -------------
 

pygccxml/parser/config.py

@@ -13,10 +13,15 @@
 import platform
 import subprocess
 import warnings
+# In py3, ConfigParser was renamed to the more-standard configparser.
+# But there's a py3 backport that installs "configparser" in py2, and I don't
+# want it because it has annoying deprecation warnings. So try the real py2
+# import first
+# Inspired by https://bitbucket.org/ned/coveragepy/commits/f8e9d62f1412
 try:
-    from configparser import ConfigParser
-except ImportError:
     from ConfigParser import SafeConfigParser as ConfigParser
+except ImportError:
+    from configparser import ConfigParser
 from .. import utils