[Travis] Configure PostgreSQL to preload schema_triggers.so

.travis.yml

@@ -6,9 +6,15 @@ addons:
 before_install:
   #- sudo apt-get install -q postgresql-9.3-postgis-2.1
   - sudo apt-get install -q postgresql-server-dev-9.3
-  - # Install schema_triggers
+  - ls /etc/init /etc/init.d | grep postgres
+  # Install schema_triggers
   - hg clone https://bitbucket.org/malloclabs/pg_schema_triggers &&
     cd pg_schema_triggers && make && sudo make install && cd -
+  # Preload schema_triggers module
+  # NOTE: might change if we make it part of the installcheck instead
+  - echo "local_preload_libraries = 'schema_triggers.so'" >> 
+    /etc/postgresql/9.3/main/postgresql.conf &&
+    sudo service postgresql restart
 
 script:
   - make