Require installation of nodejs_dependencies before running the test targ...

[ctavan]

It's currently not very intuitive that one has to run make nodejs_dependencies manually before running make test... This patch should fix it.

[RAttab]

I'm not a fan of this change because for two reasons.

First, make dependencies also includes python_dependencies which is not useful when building node programs (this is easily fixed).

Next, nodejs_dependencies always calls npm even if there's nothing to do which I dislike quite a bit. I don't think there's an easy way to only call npm when dependencies need updating (not too familiar with npm so I may be wrong). Generally speaking, if there is nothing to build or test make should return without doing anything.

Finally, nodejs_dependencies is in the build instruction and only needs to be invoked once so requiring that it be called every time you want to execute a single test is a bit overkill.