After extensive searching found an Xposed module for it! xPrivacy!
EDIT:
xPrivacy (http://repo.xposed.info/module/biz.bokhorst.xprivacy) is an Xposed module that allows you to control what data apps can access (it's more powerful than app-ops or ReceiverStop but more complex).
so what i did: after installing xPrivacy
- Scrolled in the app list to find the blocking app
- Pressed on the picture
- Scrolled in the restrictions list to "system"
- pressed on the arrow on the left to expand
- disabled relevant restrictions (serv_getInstalledApps,serv_getPackageInfo etc..)
- Had Fun :)
Hope this helps will be more than happy to add more info if needed :)