BUG/MINOR: lua: Post init register function are not executed beyond the first one

BUG/MINOR: lua: Post init register function are not executed beyond the first one

Just because if the first init is a success we return success in place
of continuing the loop.

This patch could be backported until 1.8

(cherry picked from commit 13d08b73eb99741ca5903e8414b85a1d0b919594)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 5a964670d5c1bf45b7660afbfdd078f745fa0bf9)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 093c9ed1f3b9ba2efe5b1c9c90276357309dd2a6)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>