Makes sudo: false (#3166)

* Makes sudo: false

* ignore error when configuring postgis

* Use precise instead of trusty

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
-dist: trusty
-sudo: required
+dist: precise
+sudo: false
 node_js:
 - '4.5'
 - '6.1'
@@ -15,7 +15,6 @@ before_script:
   - psql -c 'create database parse_server_postgres_adapter_test_database;' -U postgres
   - psql -c 'CREATE EXTENSION postgis;' -U postgres -d parse_server_postgres_adapter_test_database
   - psql -c 'CREATE EXTENSION postgis_topology;' -U postgres -d parse_server_postgres_adapter_test_database
-  - npm run lint
 env:
   global:
   - COVERAGE_OPTION='./node_modules/.bin/istanbul cover'