Merge branch 'ENG-4695' into ENG-4697-to-timestamp
Add new SQL FUNCTION: to_timestamp()
Make the variable more meaningful and fix the comments
Change the variable name
Merge pull request #570 from VoltDB/master

merge master
Shutdown stream snapshot data receiver thread when the snapshot it done.
ENG-3454: Fix NPE in @SystemInformation after rejoin.

For start actions that don't require catalog, @SystemInformation will throw NPE
afterwards when it tries to find the path to the catalog. Return null for the
path on the rejoined node.
Merge branch 'master' of github.com:VoltDB/voltdb into ENG-4697-to-timestamp
bug fix, change the return type of since_epoch from int to bigint
Merge branch 'ENG-4697-to-timestamp' of github.com:VoltDB/voltdb into ENG-4697-to-timestamp
Strengthen the tests for SINCE_EPOCH and TO_TIMESTAMP SQL functions
Merge pull request #572 from VoltDB/fixes-for-elastic

Fix stream snapshot thread shutdown and @SystemInformation NPE
Merge remote-tracking branch 'origin/master' into ENG-4697-to-timestamp
memcheck patch
Merge pull request #567 from VoltDB/ENG-4697-to-timestamp

Eng 4697 to timestamp