Merge pull request #2559 from edx/jibsheet/dont-specify-os-in-python-package

Tweak python package versions to remove hardcoded os version and calculate it instead

playbooks/roles/common_vars/defaults/main.yml

@@ -93,7 +93,7 @@ common_debian_pkgs:
   - rsyslog
   - git
   - unzip
-  - "python2.7=2.7.10-0+precise1"
+  - "python2.7=2.7.10-0+{{ ansible_distribution_release }}1"
   - python-pip
   - python2.7-dev