For ganglia views, use description as name only if it is set

The view's description got only used when it evaluated to false. This
made kafka views (and some other disappear).
Hence, we now use the description only as view name, if it is set. And
fallback to the name, if it the description unset.

Change-Id: I9e8ded3abd71ee462e29893455678859410eb216
Merge "For ganglia views, use description as name only if it is set" into production