Add copy ca file to horizon container.
because:
Could not find a suitable TLS CA certificate bundle,
invalid path: /etc/pki/ca-trust/source/anchors/kolla-customca-haproxy-internal.crt
Closes-Bug: #1867121
Change-Id: I64d4dbeebd53048705005b61eb3c5b2104e8f2ed
Signed-off-by: yj.bai <bai.yongjun@99cloud.net>