Update Inherited Role Assignment Extension section
Update Inherited Role Assignment Extension section

This patch updates the section which explains
inherited role assignments in order to include
information about role inheritance in a project
hierarchy.

Closes-Bug: #1409205
Change-Id: Ie3d8e1f16ee0b65b4886ae8e7866deb558238702

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