fix: Reconnect after an error. (jitsi#1199)

With Stream Management enabled ReconnectManager stops trying in some cases if the connection is closed with an error. We see that XMPPTCPConnection.connected=true in that case (TCP connection open, but an attempt to login fails).

jicofo-common/src/main/kotlin/org/jitsi/jicofo/xmpp/XmppProvider.kt

@@ -90,6 +90,18 @@ class XmppProvider(val config: XmppConnectionConfig, parentLogger: Logger) {
 
         override fun reconnectionFailed(e: Exception) {
             logger.error("XMPP reconnection failed: ${e.message}", e)
+
+            if (xmppConnection.isConnected) {
+                xmppConnection.disconnect()
+
+                // If there was an error reconnecting, do not give up, let's retry
+                // if we retry too quickly and prosody is not fully up ('invalid-namespace' error)
+                connectRetry.runRetryingTask(
+                    SimpleRetryTask(0, 1000L, true) {
+                        doConnect()
+                    }
+                )
+            }
         }
     }