Fix WADL validation errors

The dbaas.wadl file contains many text blocks which need to be
wrapped in <para> tags. Newer versions of clouddocs-maven-plugin
validate these blocks, resulting in docs build errors until they are
fixed.

Co-Authored-By: Nikhil Manchanda <SlickNik@gmail.com>

Change-Id: Ia5733a7fb1c0827a7cec500e1ee51a896a0e7754
Merge "Fix WADL validation errors"