npm module compatible with npm5 (#26582)

* npm module compatible with npm5

Uses the `--long` flag in `npm list` to get the `missing` key back.

* npm: add integration tests

* npm: test the module with npm 4 as well

* Remove debug tasks, use variables

* Use tests instead of filters

* Adds xcambar as a maintainer of the npm module

lib/ansible/modules/packaging/language/npm.py

@@ -185,7 +185,7 @@ class Npm(object):
         return ''
 
     def list(self):
-        cmd = ['list', '--json']
+        cmd = ['list', '--json', '--long']
 
         installed = list()
         missing = list()