Hapi: Deprecation Warning in Node v7.0.0 for call to os.tmpDir

[jonhester]

DeprecationWarning: os.tmpDir() is deprecated. Use os.tmpdir() instead.

os.tmpdir was added in Node v0.9.9 and os.tmpDir deprecated in Node v7.0.0. More info:

• https://github.com/nodejs/node/pull/6739
• https://nodejs.org/en/blog/release/v7.0.0/
• https://nodejs.org/api/os.html#os_os_tmpdir

Reproducible by running hapi tests under Node v7.0.0

[gittirat]

update hapi