Remove local conf information from paste-ini
Remove local conf information from paste-ini

Since keystone's PasteDeploy configuration file has been separated
from the main keystone configuration file, "keystone.conf", all
local configuration or driver-specific configuration parameters
must go in the main keystone configuration file instead of PasteDeploy
conf file, i.e. configuration in "keystone-paste.ini" is not supported.

This patch is doc specific changes in order to make usage more
clear, code specific change is submitted in another
patch(https://review.openstack.org/#/c/134124/).

DocImpact
Partial-Bug: #1369388

Change-Id: Ie81eaa621b4517da1a00a723503ea4b8cbe84b8e

rushiagr/keystone,dstanek/keystone,UTSA-ICS/keystone-kerberos,dstanek/keystone,ajayaa/keystone,rajalokan/keystone,vivekdhayaal/keystone,openstack/keystone,klmitch/keystone,roopali8/keystone,jonnary/keystone,himanshu-setia/keystone,jamielennox/keystone,klmitch/keystone,dims/keystone,himanshu-setia/keystone,cernops/keystone,jumpstarter-io/keystone,jumpstarter-io/keystone,UTSA-ICS/keystone-kerberos,cernops/keystone,ilay09/keystone,ilay09/keystone,promptworks/keystone,nuxeh/keystone,openstack/keystone,dstanek/keystone,openstack/keystone,mahak/keystone,takeshineshiro/keystone,jamielennox/keystone,takeshineshiro/keystone,nuxeh/keystone,maestro-hybrid-cloud/keystone,jonnary/keystone,vivekdhayaal/keystone,roopali8/keystone,rushiagr/keystone,ajayaa/keystone,rushiagr/keystone,idjaw/keystone,vivekdhayaal/keystone,idjaw/keystone,mahak/keystone,nuxeh/keystone,mahak/keystone,promptworks/keystone,jumpstarter-io/keystone,rajalokan/keystone,maestro-hybrid-cloud/keystone,ilay09/keystone,promptworks/keystone,dims/keystone,rajalokan/keystone