Fix SELinux capabilities. Creating a tap interface with 'tap connect' was returning an error when VPP was launched as a service (tested on CentOS 7.3). Adding 'net_admin' to SELinux capabilities for VPP solves the issue.

Change-Id: Icd0529b49adb86e7b371283a6f39af03816951c5
Signed-off-by: Victor Nguyen <victong2@cisco.com>
diff --git a/extras/selinux/vpp-custom.te b/extras/selinux/vpp-custom.te
index e0a1f64..e8ac50e 100644
--- a/extras/selinux/vpp-custom.te
+++ b/extras/selinux/vpp-custom.te
@@ -43,9 +43,9 @@
 # vpp local policy
 #
 
-allow vpp_t self:capability { dac_override ipc_lock setgid sys_rawio net_raw sys_admin }; # too benefolent
+allow vpp_t self:capability { dac_override ipc_lock setgid sys_rawio net_raw sys_admin net_admin }; # too benevolent
 dontaudit vpp_t self:capability2 block_suspend;
-allow vpp_t self:process { execmem execstack setsched signal }; # too benefolent
+allow vpp_t self:process { execmem execstack setsched signal }; # too benevolent
 allow vpp_t self:packet_socket { bind create setopt ioctl };
 allow vpp_t self:tun_socket { create relabelto relabelfrom };
 allow vpp_t self:udp_socket { create ioctl };