Fix: database value was hardcoded test value instead of var (#59)

Co-authored-by: Samuel Dumont <samuel@dumont.info>

files/sql_init.ps1

@@ -46,7 +46,7 @@ BEGIN
     CREATE USER $env:DATABRICKS_LOADER_USER;
 END
 
-GRANT CONTROL ON DATABASE::[dwtfadl] to $env:DATABRICKS_LOADER_USER;
+GRANT CONTROL ON DATABASE::[$env:DATABASE] to $env:DATABRICKS_LOADER_USER;
 
 EXEC sp_addrolemember 'staticrc20', '$env:DATABRICKS_LOADER_USER';