add placeholder in password

Author: barbaravaldez

doc/usage_guide.md

@@ -167,7 +167,7 @@ mssql-cli -S localhost -d AdventureWorks
 Set environment variable MSSQL_CLI_PASSWORD to set a default password.
 
 ```bash
-set MSSQL_CLI_PASSWORD=abc123
+set MSSQL_CLI_PASSWORD=[PLACEHOLDER]
 mssql-cli -S localhost -d AdventureWorks -U sa
 ```
 

tests/test_special.py

@@ -33,7 +33,7 @@ def setUpClass(cls):
             list(client.execute_query('CREATE FUNCTION {0}() \
                                        RETURNS TABLE AS RETURN (select 1 as number);'
                                       .format(cls.function)))
-            list(client.execute_query('CREATE LOGIN {0} WITH PASSWORD=\'yoloC123445!\''
+            list(client.execute_query('CREATE LOGIN {0} WITH PASSWORD=\'PLACEHOLDER\''
                                       .format(cls.login)))
         finally:
             shutdown(client)