with this commit, the google compute instance acceptance tests are
passing
- remove GOOGLE_CLIENT_FILE requirement from provider tests to finish
out #452
- skip extra "#" key that shows up in metadata maps, fixes#757 and
sprouts #883 to figure out core issue
- more verbose variablenames in metadata parsing, since it took me
awhile to grok and i thought there might have been a shadowing bug in
there for a minute. maybe someday when i'm a golang master i'll be
smart enough to be comfortable with one-char varnames. :)
This makes testing easier and gives you a way to configure the provider
using env variables. It also makes the provider more inline following
the TF 0.2 approach.
