This change set hides etcdraft configuration from the orderer.yaml
in order for the configuration to be more consumable and user friendly.

Change-Id: Ic8e5c0aeeaf841313f6b5e6460d02cbd07243ea7
Signed-off-by: yacovm <yacovm@il.ibm.com>
(cherry picked from commit 56dc7991de0e14bc06e37713b2dba44348e6cf4f)