connectors-643. Adding the header 'Accept'='application/json;esl-api-version=10.6' and the content-type 'Content-Type'='application/json;esl-api-version=10.6' on all request which are not involving binaries. Added a FINER level log for calls to log the headers and other details information on the requests. Deleted the log4j.properties from the test since we are not even using log4j.