Merge pull request #3201 from akatsoulas/upgrade-django

Upgrade Django to version 1.11.18.

requirements/prod.txt

@@ -239,9 +239,9 @@ django-jinja==2.4.1 \
 puente==0.5.0 \
     --hash=sha256:7ba1d07f9cee9657adf874bd94879b343fea81a783fdfa8e53885520477bf1ea \
     --hash=sha256:4a17958f7d6a83cb9ff92593c40f34911abafaec6ad959916b754aaa3869f11f
-Django==1.11.17 \
-    --hash=sha256:a787ee66f4b4cf8ed753661cabcec603989677fa3a107fcb7f15511a44bdb483 \
-    --hash=sha256:f1a961b954d96bb24b397db4c35e9a128d12e044d6b57984c122282b592d508d
+Django==1.11.18 \
+    --hash=sha256:7ee7d93d407f082e3849c8d10da50ff5b488af37ed1b0066a22dee5f2709ed16 \
+    --hash=sha256:73cca1dac154e749b39cc91a54dc876109eb0512a5c6804986495305047066a5
 django-babel==0.6.2 \
     --hash=sha256:1e621b198e1f98ae4f93e43463cf78cbedbace475eb6e0853ba1e2567f3b8119 \
     --hash=sha256:b62084a6f0cbf2e7af719bd129abfe54608a52645c0677aff5a728f586873af7