The commenting module does not use the website as information to store comments, so the comments
are global to all sites, this patch adds the option to set a parameter in the paragraph definition (useSiteName)
to make the commenting module use a forum per website. The forum name is made of the forumName specified
in the definition and the website name, retrieved from the root node of the content the paragraph is placed in.

Enabling this does require someone the create the forum called by this, and set the corresponding
acl' s for the users.

Attached is the diff containing:

• changes to the bootstrap xml's for the paragraphs (default not using the site name).
• changes to the java code of PageComments.java and LatestComments.java
• a CommentingUtil class containing the method to determine the forum name