[Mod] psql: use connection string

[Mod] test_all.py: return 1 if errors

.travis.yml

@@ -12,8 +12,8 @@ services:
   - postgresql
 
 before_script:
+  - psql -d postgresql://postgres:@localhost -c "create database vnpy;"
   - mysql -e 'CREATE DATABASE vnpy;'
-  - psql -c 'create database vnpy;' -U postgres
 
 script:
   # todo: use python unittest

tests/test_all.py

@@ -25,7 +25,7 @@ def main():
 
 if __name__ == '__main__':
     result = main()
-    if result.failures:
+    if result.failures or result.errors:
         exit(1)
     else:
         exit(0)