Fix Basic Authentication for CouchDB GET Request

Hi all,
I'm submitting this patch on behalf of Appdynamics Helpdesk ticket 23424.
This will stop attempting to pass the user+pass via the URL (which doesn't appear to work as expected), and instead forge a Basic auth Header within the get request from the provided settings in HostConfig.xml

Tested here, and it looks good (CouchDB agrees to give the data over anyway!).

Hope this helps.