Consolidate ssl settings

This patch moves the following SSL related settings into single place
 * USE_SSL
 * SECURE_PROXY_SSL_HEADER
 * CSRF_COOKIE_SECURE
 * SESSION_COOKIE_HTTPONLY
 * SESSION_COOKIE_SECURE

Change-Id: I0c4dcbee6e45b8cb8abcef2be9e9889580b2cac5
Related-Prod: PROD-23567
3 files changed