The blog post page title is preformatted when the 'Preformatted names' naming strategy is selected

Steps to reproduce :

• Login as Admin
• Go to Administer Wiki > Editing > Name Strategies
• Select 'Preformatted names (no accents, no space, no special characters)' as Current Naming Strategy, and 'Transform Names Automatically' as Enabled
• Go to Blog Application's Home Page
• Create a new blog post with a name containing spaces, an accent and a special character (e.g. Test blog post)
• Save and publish the post

Expected results :

The blog post page name have been preformatted according to the selected naming strategy and the title of the blog post page remained unchanged as entered by the user.
Page name = Test-blog-post
Page title = Test blog post

Actual results :

Both page name and title have been preformatted according to the selected naming strategy.
Page name = Test-blog-post
Page title = Test-blog-post

This issue is a regression caused by the change done on BLOG-160.

We need to fix the blog post creation code in order to fix the issue.