committing changes in /etc after apt run

Package changes:
+letsencrypt 0.4.1-1 all
+python-acme 0.4.1-1 all
+python-configargparse 0.10.0-2 all
+python-dialog 3.3.0-2 amd64
+python-funcsigs 0.4-2 all
+python-letsencrypt 0.4.1-1 all
+python-mock 1.3.0-2.1ubuntu1 all
+python-ndg-httpsclient 0.4.0-3 all
+python-parsedatetime 1.4-1 all
+python-pbr 1.8.0-4ubuntu1 all
+python-psutil 3.4.2-1 amd64
+python-rfc3339 1.0-4 all
+python-tz 2014.10~dfsg1-0ubuntu2 all
+python-zope.component 4.2.2-1 all
+python-zope.event 4.2.0-1 all
+python-zope.hookable 4.0.4-4build2 amd64

diff --git a/alternatives/pbr b/alternatives/pbr
index 0ac3fb33d96d5aee3b9bee053b7b16177cca8f3a..a1a51d1b055ba8e7f6be78d216565fa328988fa4 120000 (symlink)
--- a/alternatives/pbr
+++ b/alternatives/pbr
@@ -1 +1 @@
-/usr/bin/python3-pbr
\ No newline at end of file
+/usr/bin/python2-pbr
\ No newline at end of file