Further to add,
Since we are at EHP 7, and EA-HR 608, I referred your blog and I could see statement as below:
11. Retrofit into EA-HR 607
EA-HR_MSS 1.0 has been retrofitted into EA-HR 607. So, once you have the Product Version: EHP7 FOR SAP ERP 6.0 or HR RENEWAL 1.0 installed, EA-HR_MSS 1.0 will not exist as a separate add-on."
So what has to be done to get MSS roles in system as I can not find any MSS_WDA roles so that I can upload it to portal.
Regards
Shipra