I have JIRA issue created

• branch and/or PR name(s) includes JIRA ID
• issue has "Fix version" assigned
• issue "Status" is set to "In review"
• PR labels are selected
• FLP integration tests were ran successful

PR which:

• fixes an issue in which the broadcast, send, unfilteredBroadcast would log an error on WS server due to attempting to send a message to a client that already started the terminate connection stage
• error message: WebSocket is not open: readyState 2 (CLOSING)
• the bug was happening because while the closing state is happening, the client still appears in client list.
• by using the client state which gets updated on immediate call of terminate, we can better know which client to still respond to
• rename callbackArray and initialize in a Map as per its actual use in the server
• add input validation to bind method to ensure overriding of server bindings is not happening