Use more scripts in katello procedures

These scripts were already used in Foreman procedures.

procedures/katello/branch.md.erb

@@ -84,4 +84,4 @@
 
 - [ ] Run `./tools.rb koji configs/katello/<%= release %>.yaml --confirm` from [tool_belt](https://github.com/theforeman/tool_belt) to create Koji tags
 - [ ] Run `./tools.rb mash-scripts configs/katello/<%= release %>.yaml` from [tool_belt](https://github.com/theforeman/tool_belt) to create Koji mash configs and open PR to tool_belt to commit
-- [ ] Copy mash configs to Koji `scp mash_scripts/katello/<%= release %>/*.mash [email protected]:/etc/mash/`
+- [ ] Copy mash configs to Koji using <%= rel_eng_script('deploy_mash_configs') %>

procedures/katello/release.md.erb

@@ -67,7 +67,7 @@
 - [ ] Update `katello`, `katello-repos` and `rubygem-katello` 
   - [ ] Use <%= rel_eng_script('bump_rpm_packaging') %>: `PROJECT=katello VERSION=<%= short_version %> ./bump_rpm_packaging`
 - [ ] Merge packaging PR once job is green
-- [ ] Wait for [Jenkins to build the packages](https://ci.theforeman.org/job/foreman-packaging-rpm-<%= short_version %>-release/) (replace <%= short_version %> with the matching Foreman version)
+- [ ] Use <%= rel_eng_script('wait_packaging') %> to wait for [Jenkins to build the packages](https://ci.theforeman.org/job/foreman-packaging-rpm-<%= short_version %>-release/) (replace <%= short_version %> with the matching Foreman version)
 - [ ] <%= rel_eng_script('download_rpms') %>, <%= rel_eng_script('sign_rpms') %>, <%= rel_eng_script('upload_rpm_signatures') %>, <%= rel_eng_script('upload_rpms') %>
 - [ ] Use <%= rel_eng_script('release_pipeline') %> to kick off the [release pipeline](https://ci.theforeman.org/job/katello-<%= short_version %>-rpm-pipeline/)