LoopBack REST adapter owns the whole URL space and does not let other
middleware handle same URLs. It's possible to circumvent this measure
by installing the explorer middleware before the REST middleware.
Loopback-explorer loads express and strong-remoting from loopback's
`node_modules` folder. This fails when one of those dependencies
was installed to the parent project, e.g. as a peer dependency.
app/node_modules
+- express # <- express installed as peer to loopback
+- loopback
+- node_modules # <- express is not there
As of this commit, loopback-explorer will retry the `require()` call
without `loopback/node_modules` prefix if the first require fails.
1. `require('loopback/node_modules/express')`
2. `require('express')`
The change should fix (some of) unit-tests failures in
https://github.com/strongloop/loopback-workspace