oeqa/sdkext/devtool: use a smaller module to test node.js functionality

oeqa/sdkext/devtool: use a smaller module to test node.js functionality

The "forever" package, despite its innocent description, actually drags
in a surprising number of dependencies and as a result the nodejs test
takes up to 10 minutes as a result. Pick a different example with a much
more reasonable set of dependencies.

Addresses part of [YOCTO #10254].

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>