Start explicit list of test modules

Author: OskarPersson

.travis.yml

@@ -52,6 +52,6 @@ install:
 script:
   - cd "$TRAVIS_BUILD_DIR/../django/tests"
   - pip install -r requirements/py3.txt
-  - export TESTS_TO_RUN=$(grep -Iriw "sql\|db" . | grep test | grep "/.*/" | cut -d"/" -f2 | sort | uniq | grep -v gis_tests)
-  - echo "Will run tests in following apps $TESTS_TO_RUN"
-  - ./runtests.py --settings=testapp.settings $TESTS_TO_RUN
+  - ./runtests.py --settings=testapp.settings \
+    aggregation \
+    aggregation_regress