Clean up WADL and XML files in prep for generating PDFs on api-site

Cleaned up servers and extension WADL files to resolve some errors
Ensured all PDFs build successfully.

The api-ref-guides only publish PDF files.

Partial-Bug: #1243631

Change-Id: Iab24d2a1845475449977786b84b974c085bae6da
author: diane fleming
Merge "Clean up WADL and XML files in prep for generating PDFs on api-site"