Add new option: db.sample.data.enabled

Signed-off-by: Pekka Helenius <fincer89@hotmail.com>

bookstore/src/main/resources/application-prod.properties

@@ -7,4 +7,9 @@
 
 # Enable production environment restrictions?
 security.enabled        = true
-security.book.count.max = 5
+security.book.count.max = 5
+
+# Enable sample data in production environment?
+# This is the same dataset than used in dev profile
+#
+db.sample.data.enabled  = true