When enforcing SELinux, the commit enables the following SELinux
booleans:
- os_haproxy_enable_nsfs: it allows haproxy to run in a network
namespace.
- os_haproxy_ping: it allows calls to the ping command from haproxy (for
PING HMs)
- cluster_use_execmem
Change-Id: I4b5199d13d122b56619c4a2d21e86a06bd0dc3bf
(cherry picked from commit 3115589f21)
(cherry picked from commit 995fe216e2)