With tls-everywhere enabled the connection from haproxy to the nova novnc
proxy was not encrypted. Now we request a certificate and configue haproxy
and the novnc proxy to encrypt this remaining part in a vnc connection to
be encrypted as well.
Change-Id: Ia0c8c452f0121298bef58409bd0bdbe4caa54e42
Closes-Bug: #1785700
Depends-On: Ice51fe175bdc1cb14fa49cf53d1f38e9728bbb60
Depends-On: I4667706633205c240f2efb51663e6efbce5e344e