Allow deploying keystone with SSL certificates

Allow providing certificates through environment variables to be used
for keystone, and provide the basis for doing this for other services.
It cannot be used in conjunction with tls-proxy as the service provides
it's own encrypted endpoint.

Impletmenting: blueprint devstack-https
Change-Id: I8cf4c9c8c8a6911ae56ebcd14600a9d24cca99a0
diff --git a/lib/swift b/lib/swift
index c103b5b..c049311 100644
--- a/lib/swift
+++ b/lib/swift
@@ -306,6 +306,7 @@
     iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:authtoken auth_host $KEYSTONE_AUTH_HOST
     iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:authtoken auth_port $KEYSTONE_AUTH_PORT
     iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:authtoken auth_protocol $KEYSTONE_AUTH_PROTOCOL
+    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:authtoken cafile $KEYSTONE_SSL_CA
     iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:authtoken auth_uri $KEYSTONE_SERVICE_PROTOCOL://$KEYSTONE_SERVICE_HOST:$KEYSTONE_SERVICE_PORT/
     iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:authtoken admin_tenant_name $SERVICE_TENANT_NAME
     iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:authtoken admin_user swift
@@ -325,6 +326,7 @@
 auth_port = ${KEYSTONE_AUTH_PORT}
 auth_host = ${KEYSTONE_AUTH_HOST}
 auth_protocol = ${KEYSTONE_AUTH_PROTOCOL}
+cafile = ${KEYSTONE_SSL_CA}
 auth_token = ${SERVICE_TOKEN}
 admin_token = ${SERVICE_TOKEN}