V4 -- path problems for generated components

[sthzg]

I will add a unit test to illustrate this after posting the issue. To manually recreate:

yo react-webpack:component hello
#   create src/components/hello.cssmodule.less
#   create src/components/Hello.js
#   create test/components/HelloTest.js

cat test/components/HelloTest.js
#   ...
#   import Hello from 'components//Hello.js';
#                                ˜˜

As illustrated, when generating components wo/ a nested namespace (i.e. opposed to yo react-webpack:component my/hello) it will print two slashes.

[sthzg]

Closed with #254