Updated Content Sources

Added MaxSiteEnumerationDepth to 0 for all content sources to ensure
that the crawl will 'Only crawl within the server of each start address'
(see radio button when editing the content source in Central Admin).
Updated configuration XML

Corrected the URLs for the other environments.
Formatted the xml in CreateCrawlerManagedProperties.
Updated the search API application

Added a username and password to the application pool.
Added a BindingHostName for the application in each environment and set
the port to 80 as requested.