When vRtrMplsLspPathSharing has a value of 'true', path-sharing
is enabled for the secondary path. Path-sharing is used to
control the hops of the secondary path.
When vRtrMplsLspPathSharing have a value of 'false', CSPF attempts
to find a path for the secondary that does not include any node
or link that is common to the active primary path.
This variable is valid only if vRtrMplsLspPathType is set to
'secondary'.