Various warnings and messages during npm portion of install

[bmcdougald]

Doing a firmament build of Datawake I'm seeing numerous warnings about trusted keys and signatures not found as well as other related kerberos warnings.

Additionally, if I change the "Image": "jreeme/strongloop:10" line in my firmament json to 11 or other increment (so it doesn't find an existing docker image) it tries to build the strongloop container and that results in a LOT of other warning messages about missing folders, undefined users, etc during the node install portion of the run. The container does get built and seems to work ok, but there is a lot of worrisome "red" on the screen during the process.