slack: Add test for ./manage.py import zulip_data.

.travis.yml

@@ -1,23 +1,36 @@
 language: python
+sudo: required
 python:
   - "3.4"
-  - "3.5"
-  - "3.6"
-env: TEST_SUITE=test-main
+env:
+  matrix:
+    - TEST_SUITE=test-main
+  global:
+    - BOTO_CONFIG=/tmp/nowhere
 matrix:
   include:
   - python: "2.7"
     env: TEST_SUITE=test-py2-legacy-support
   - python: "3.6"
     env: TEST_SUITE=test-static-analysis
-install:
-  - tools/provision --force
-  - source zulip-api-py*-venv/bin/activate
-script:
-  - tools/$TEST_SUITE
+  - python: "3.4"
+    env: TEST_SUITE=backend
+    script:
     - wget https://github.com/houstondatavis/slack-export/archive/master.zip
     - mv master.zip slack-export-master.zip
     - zulip/integrations/slack/slackdata2zulipdata.py $PWD/slack-export-master.zip
+    - mv zulip_data.zip $HOME
+    - cd
+    - ls
+    - git clone https://github.com/zulip/zulip.git
+    - cd zulip
+    - ./tools/travis/setup-backend
+    - ./manage.py import ../zulip_data.zip
+    addons:
+      postgresql: "9.3"
+install:
+  - tools/provision --force
+  - source zulip-api-py*-venv/bin/activate
 after_success:
   - pip install codecov
   - codecov