[FAB-14368] Glossary updates for Raft

Cherry picking change merged in master

Add glossary definitions for:
Consenter set
Finite state machine
Log entry
Raft

Change-Id: I9695968b7ccf53c55d66d0713f6b6e32f63a933f
Signed-off-by: joe-alewine <Joe.Alewine@ibm.com>
(cherry picked from commit 68f6554168311e9aaae141b92c45f3273c43f3bd)