For ENG-5201, add caching for reverse DNS and localhost lookups
For ENG-5201, remove erroneous reverse DNS lookup
For ENG-5201, patch up license check
For ENG-5201, remove uneccessary memoization and handle failed local address lookup
updated voter client dependency to guava 15
Merge pull request #800 from VoltDB/update-guava

updated voter client dependency to guava 15
updated guava version in README.thirtparty
Merge pull request #801 from VoltDB/update-readme-guave

updated guava version in README.thirtparty
For ENG-5201, fix timeout and comment based on Ning's feedback
Merge pull request #797 from VoltDB/ENG-5201

Eng 5201 Add reverse DNS cache and commit hooks to prevent uncached reverse lookups
Merge pull request #798 from VoltDB/ENG-4881-continued

ENG-4881 Hashinator save/restore
Merge branch 'master' into ENG-4881-continued