Upgrade to Node v6.9.1
Upgrade to Node v6.9.1

Bug: T149331
Change-Id: I7eb68b1ecebde34e8fe0999b360452c9a3039ed2

wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps