The `cluster diff` command is now tested by doing add/alter/remove
operations on servers. As the same methods are used for all objects, they
should detect all sorts of modifications between two Maxscales.
Making the core a module proved to bring more problems than it solved. For
the sake of simplicity in installation and code coverage reporting, the
core is now completely contained in the `lib/` directory.
Also added preliminary coverage reporting with nyc.
The request-promise-native package adds support for request with native
promises. This is a convenient way to synchronize multiple HTTP requests.
The functions are changed to use promises to make testing easier. With
promises, the testing code can use the chai-as-promised library.
There are a few cases where doRequest is called with a callback that again
calls doAsyncRequest. With multiple hosts, this causes each command to be
propagated to all servers. This is a design flaw of the current multi-host
mode and needs to be changed.
Changed maxctrl.js to wait on the promises to silence some warnings if the
promise rejections are ignored.
