Install Sentry Django integration correctly

Author: tobiasge

requirements-container.txt

@@ -2,4 +2,4 @@ django-auth-ldap==4.8.0
 django-storages[azure,boto3,dropbox,google,libcloud,sftp]==1.14.3
 dulwich==0.22.1
 python3-saml==1.16.0 --no-binary lxml
-sentry-sdk==2.1.1
+sentry-sdk[django]==2.1.1