Socket won't have any smack label when smack is turn off.
Socket won't have any smack label when smack is turn off.

[Issue#]   SSDWSSP-68
[Bug]      Security-server does not work without smack.
[Cause]    Smack was mandatory.
[Solution] Add runtime check for smack existance.

[Verfication] Run tests.

Change-Id: I431a2c86a6f110f5c79b3795e07f32e49759cd28

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