Reformat glossary

This formats the glossary in the OPS guide the same way as the file
in the openstack-manuals repository.

It changes whitespace and adds comment marks for each letter.

This allows easier syncing with the openstack-manuals version.

Change-Id: I82a7dfa6a4c8f672d410a005dc0e8e127a6397fc
Note: Best reviewed with "git diff -w".
Merge "Reformat glossary"