move security control panel from plone.app.controlpanel, #216

Also replaced portal_properties lookups with plone.app.registry
lookups and added a robot test.
update robot tests for security panel
fix handle_enable_user_folders to make it actually work, add a test
Merge pull request #264 from jcerjak/plip10359-security-controlpanel

Plip10359 - move security controlpanel from plone.app.controlpanel