Remove traling slashes from namespace if present

[Globegitter]

When you provide an empty string for the admin namespace, but provided a namespace within your adapter then you get a resulting namespace with a trailing slash which leads to generate a url with two slashes.

Example: application adapter namespace:

namespace: 'api/v1',
host: 'http://localhost:1337'

admin namespace: namespace: '' leads to http://localhost:1337/api/v1//model

The replace makes sure that the last slash in the namespace gets removed and this then leads to the correct url http://localhost:1337/api/v1/model

[bcardarella]

:+1: but can we get a test to cover regressions?

[Globegitter]

Yep, will look into that now.

[Globegitter]

Added and passing. Let me know if that works.

[bcardarella]

Awesome, thanks. We just started using this style a month ago. Thanks for catching those.

Last request, can you squash into a single commit?

[Globegitter]

Yep of course - all squashed.

[bcardarella]

Thanks!