Remove anti-virus tests from libprivilege group.

Remove anti-virus tests from libprivilege group.

[Issue#]       N/A
[Feature]      Adapt tests to tizen.org
[Cause]        Tests failing because AV (anti-virus) functionality is deprecated
[Solution]     Remove tests connected to anti-viruses.
               Leave av test marked as ignored and deprecated. It will be
               removed when libprivilege API is cleaned up.

[Verification] Build, install, run tests.

               The following test cases should not be present on the list:
                - privilege_control24a_av_privilege_group_rw
                - privilege_control24b_av_privilege_settings_rw
                - privilege_control24c_av_privilege_public_ro

Change-Id: I2a468990065aae3aa83a81c9336b6d7e6595c9aa
Signed-off-by: Marcin Lis <m.lis@samsung.com>