Fixes spacing in sentences on configuration doc
Fixes spacing in sentences on configuration doc

This patch fixes several sentences that contain
double-spacing, where just one space is needed.

Partial-Bug: #1409203
Change-Id: I6a79058bf14594c435521048e1abdddb2dcfbf24

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