Fix datasource initialization property

Closes gh-301

src/main/resources/application-mysql.properties

@@ -3,5 +3,5 @@ database=mysql
 spring.datasource.url=jdbc:mysql://localhost/test
 spring.datasource.username=root
 spring.datasource.password=root
- # Uncomment this the first time the app runs
-# spring.datasource.initialize=true
\ No newline at end of file
+# Uncomment this the first time the app runs
+# spring.datasource.initialization-mode=always