docs: Fix minor inconsistencies in release management

Merge pull request #200 from obnoxxx/resurrect-deploy-heketi

Resurrect the deploy-heketi deployment scheme.

Merge pull request #173 from MohamedAshiqrh/heketi4

Support for heketi 4 Release changes

Merge pull request #82 from MohamedAshiqrh/g

Gluster templates are added without -g

Merge pull request #71 from obnoxxx/cgroup-readonly

Gluster Template: make /sys/fs/cgroup readonly

Merge pull request #63 from jarrpa/vagrant-update

vagrant: Make firewall changes permanent on nodes