Update documentation related to hazelcast

- removed old entries of data structures which are removed now.
- updated the documentation to correctly reflect our infrastructure
  startegy related to hazelcast.
- fixed few NB comments on the merged patch.

Issue-ID: CPS-2408
Change-Id: Id7ce4ac695ad94742490ac5d2be89cd23ffda3e5
Signed-off-by: mpriyank <priyank.maheshwari@est.tech>
4 files changed