Docs: Fix doc building under CI
Docs: Fix doc building under CI

Under CI the CouchDB version configured can break the LaTeX PDF
building.

This patch munges the release name for doc builds.

Python styles from Eli Stevens and Alexander Shorin.

Closes COUCHDB-2007

andywenk/couchdb-documentation,kxepal/couchdb-documentation,KimStebel/couchdb-documentation,cloudant/couchdb-documentation,andywenk/couchdb-documentation,kxepal/couchdb-documentation,robertkowalski/couch-doc-test,robertkowalski/couch-doc-test,robertkowalski/couchdb-documentation,micah/couchdb-documentation,kxepal/couchdb-documentation,cloudant/couchdb-documentation,micah/couchdb-documentation,robertkowalski/couch-doc-test,robertkowalski/couchdb-documentation,micah/couchdb-documentation,KimStebel/couchdb-documentation,andywenk/couchdb-documentation,robertkowalski/couchdb-documentation,KimStebel/couchdb-documentation