dragonboat: bumped version to v3.2.7

dragonboat: bumped dragonboat version to 3.2.6

dragonboat: bumped dragonboat version to 3.2.5

dragonboat: fixed snapshot compction

Previously, snapshot compaction is triggerred everytime when an incoming
snapshot is saved. This can potentially delete snapshots that are about
to be restored.

dragonboat: bumped version to v3.2.3

dragonboat: bumped version to v3.2.3

Merge branch 'protobuf-1.4-fix' into release-3.2

dragonboat: bumped version number to v3.2.1

Merge branch 'master' into release-3.2

dragonboat: fixed some missing settings