fix(travis): Do not use use_site

.travis.yml

@@ -3,31 +3,32 @@ dist: trusty
 language: python
 
 addons:
+  hosts: test_site
   mariadb: 10.3
 
 jobs:
   include:
   - name: "Python 2.7 Server Side Test"
     python: 2.7
-    script: bench run-tests --app erpnext --coverage
+    script: bench --site test_site run-tests --app erpnext --coverage
 
   - name: "Python 3.6 Server Side Test"
     python: 3.6
-    script: bench run-tests --app erpnext --coverage
+    script: bench --site test_site run-tests --app erpnext --coverage
 
   - name: "Python 2.7 Patch Test"
     python: 2.7
     before_script:
       - wget http://build.erpnext.com/20171108_190013_955977f8_database.sql.gz
       - bench --force restore ~/frappe-bench/20171108_190013_955977f8_database.sql.gz --mariadb-root-password travis
-    script: bench migrate
+    script: bench --site test_site migrate
 
   - name: "Python 3.6 Patch Test"
     python: 3.6
     before_script:
       - wget http://build.erpnext.com/20171108_190013_955977f8_database.sql.gz
-      - bench --force restore ~/frappe-bench/20171108_190013_955977f8_database.sql.gz --mariadb-root-password travis
-    script: bench migrate
+      - bench --site test_site --force restore ~/frappe-bench/20171108_190013_955977f8_database.sql.gz --mariadb-root-password travis
+    script: bench --site test_site migrate
 
 install:
   - cd ~
@@ -55,9 +56,8 @@ before_script:
 
   - cd ~/frappe-bench
   - bench get-app erpnext $TRAVIS_BUILD_DIR
-  - bench use test_site
-  - bench reinstall --mariadb-root-username root --mariadb-root-password travis --yes
-  - bench scheduler disable
+  - bench --site test_site reinstall --mariadb-root-username root --mariadb-root-password travis --yes
+  - bench --site test_site scheduler disable
   - sed -i 's/9000/9001/g' sites/common_site_config.json
   - bench start &
   - sleep 10