Changed load balancer endpoint timeout to 60 sec

Signed-off-by: Imesh Gunaratne <imesh@apache.org>
Fixed messaging model session timeout handling, subscriber re-connection and publisher retry logic

Signed-off-by: Imesh Gunaratne <imesh@apache.org>
Removed topic publisher retry from health checker ping event

Signed-off-by: Imesh Gunaratne <imesh@apache.org>
excluding dhtmlHistory.js file from license verification

Signed-off-by: Imesh Gunaratne <imesh@apache.org>