When I919ba42b0d22126719daa7ad308f75ce021720b7 merged, it introduced
a few regressions into our process:
* Github renaming/transferring was dropped
* Switched to a very slow (for our environment) Zuul stopping
method
* it advocated for composing a rename parameters file very late
in the process
This change fixes the above issues. It also updates the
documentation to note that Puppet should be stopped well in advance
of the maintenance window, and updates the playbook to no longer run
an offline Gerrit reindex (since online reindexing is now
supported).
Change-Id: Ie249214c0d1b1df6c66d4910002e35d8c17c3b69
65ed837e31