Fix a bug in SnapshotDaemon that will fail to notify the caller when a queued snapshot succeeds.
Fix a bug in SnapshotDaemon that will fail to notify the caller when a queued
snapshot succeeds.

flybird119/voltdb,flybird119/voltdb,zuowang/voltdb,ingted/voltdb,simonzhangsm/voltdb,kobronson/cs-voltdb,kumarrus/voltdb,kobronson/cs-voltdb,deerwalk/voltdb,migue/voltdb,VoltDB/voltdb,creative-quant/voltdb,zuowang/voltdb,kobronson/cs-voltdb,flybird119/voltdb,kobronson/cs-voltdb,ingted/voltdb,creative-quant/voltdb,migue/voltdb,ingted/voltdb,zuowang/voltdb,simonzhangsm/voltdb,creative-quant/voltdb,creative-quant/voltdb,kumarrus/voltdb,kumarrus/voltdb,kobronson/cs-voltdb,VoltDB/voltdb,migue/voltdb,flybird119/voltdb,zuowang/voltdb,paulmartel/voltdb,deerwalk/voltdb,zuowang/voltdb,VoltDB/voltdb,kobronson/cs-voltdb,paulmartel/voltdb,flybird119/voltdb,ingted/voltdb,kobronson/cs-voltdb,ingted/voltdb,paulmartel/voltdb,simonzhangsm/voltdb,migue/voltdb,deerwalk/voltdb,simonzhangsm/voltdb,VoltDB/voltdb,paulmartel/voltdb,migue/voltdb,zuowang/voltdb,migue/voltdb,deerwalk/voltdb,wolffcm/voltdb,zuowang/voltdb,paulmartel/voltdb,wolffcm/voltdb,wolffcm/voltdb,creative-quant/voltdb,simonzhangsm/voltdb,kumarrus/voltdb,deerwalk/voltdb,kumarrus/voltdb,simonzhangsm/voltdb,wolffcm/voltdb,creative-quant/voltdb,ingted/voltdb,VoltDB/voltdb,deerwalk/voltdb,zuowang/voltdb,VoltDB/voltdb,paulmartel/voltdb,creative-quant/voltdb,flybird119/voltdb,wolffcm/voltdb,ingted/voltdb,wolffcm/voltdb,kobronson/cs-voltdb,paulmartel/voltdb,flybird119/voltdb,ingted/voltdb,kumarrus/voltdb,wolffcm/voltdb,migue/voltdb,flybird119/voltdb,simonzhangsm/voltdb,paulmartel/voltdb,migue/voltdb,creative-quant/voltdb,simonzhangsm/voltdb,wolffcm/voltdb,VoltDB/voltdb,kumarrus/voltdb,kumarrus/voltdb,deerwalk/voltdb,deerwalk/voltdb