* Resolve dir argument of getLocalNodeFiles function
The getLocalNodeFiles is called 3 times. Each time it called, the callee needs to resolve the dir argument.
That was not done for several of calls, and local modules (specified in the "nodesDir" setting) were not returned to client because of that.
This fix will allow to make sure the dir is consistently resolved.
* Several changes in "localfilesystem_spec.js":
- Changed checkNodes to verify that every node's file property is resolved, i.e. containst absolute path, not relative.
- Added a unit-test "Finds nodes in settings.nodesDir (string,relative path)"
