[JENKINS-58595] Add missing ${h} in rss and atom views (#4148)

* [JENKINS-58595] Add missing ${h} in rss and atom views

Now that l:view was fixed not to output whitespace, these views can be
updated to directly use l:view. Otherwise, they needed to initialize
the ${h} Jelly variable which is done via l:view normally.

This fixes a regression introduced in SECURITY-534.

Signed-off-by: Matt Sicker <boards@gmail.com>

* Fix the fix

Signed-off-by: Matt Sicker <boards@gmail.com>