[S2GRAPH-133] Deprecating Vagrant environment.
[S2GRAPH-133] Deprecating Vagrant environment.

JIRA:
    [S2GRAPH-133] https://issues.apache.org/jira/browse/S2GRAPH-133

Pull Request:
    Closes #106

Author
    Hyunsung Jo<hyunsung.jo@gmail.com>

SteamShon/incubator-s2graph,SteamShon/incubator-s2graph,SteamShon/incubator-s2graph