improve the UserServicesFactory Form default handling
Merge pull request #57 from rollerworks/hotfix-form-config-converting

This PR was merged into rollerworks:master branch.

Discussion
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Improve the UserServicesFactory Form default handling

                   
|Q            |A  |
|---          |---|
|Bug Fix?     |y  |
|New Feature? |y  |
|BC Breaks?   |n  |
|Deprecations?|n  |
|Tests Pass?  |y  |
|Fixed Tickets|   |
                   
Related to GH-55 GH-56

This improves the UserServicesFactory Form default handling

* Detect if a custom class is used with the default fos form-type
* Change 'only' the name when it uses the fos_user prefix

This removes the requirement to set the class, type and the name.
And fixes an edge case where only the name uses the fos_user prefix

And updates the documentation, which was missing the name in the example.

Commits
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02e22d4abcabed62f2f42b1237f343658329e89f improve the UserServicesFactory Form default handling sstok