Listen on socket passed by systemd
Listen on socket passed by systemd

This was previously disabled in security-manager code, because it was
coupled with security-server, which already did that.
Uncommenting the listening code now.

Change-Id: I9e7c5a3a5bde2e29fc74b9918af0a36992533a80
Signed-off-by: Rafal Krypa <875f2afab983118b44e45bad4cf04b04767e9f4a@samsung.com>

pohly/security-manager,pohly/security-manager,Samsung/security-manager,Samsung/security-manager,pohly/security-manager,Samsung/security-manager