This is porting from stx/stx-integ/base/haproxy/centos.
The version in centos is 1.5.18, but it's not compatible with
openssl 1.1.1b in yocto, so add the version 1.7.11.
For the stx patches:
- haproxy-env-var.patch: no needed for 1.7.11
- haproxy-tpm-support.patch: rebase for 1.7.11
stx-integ/haproxy-config: install haproxy.service to /etc/systemd/system
to avoid conflicts with haproxy.
close #11
Signed-off-by: Jackie Huang <jackie.huang@windriver.com>