A recent change[1] to Octavia added a parameter named
server_certs_key_passphrase, which means that TripleO should
generate a password for it to avoid using the default value.
This patch adds OctaviaServerCertsKeyPassphrase to the list
of parameters TripleO configures in Octavia.
Closes-Bug: #1821756
Related-Bug: #1821751
[1] I06d329ca53bc36bd27f7870ae7c7ca0cf18575b2
Depends-On: I9699961faf8b3430e4372e4ff3ae2bf7e7ceea18
Depends-On: Id6c0d156715147c6559dc39098a6eaabf77ac426
Depends-On: I5e60e8fbb7af381b59c6d7b02d5ba8eb47e91720
Change-Id: Icadd090f027af6f958c25af6bfb09195a4019aa8
(cherry picked from commit 4559d3b74f)