check_jabber.t: update the unresponsive reply

plugins/t/check_jabber.t

@@ -31,7 +31,7 @@ my $hostname_invalid   = getTestParameter(
 
 my $jabberOK = '/JABBER OK\s-\s\d+\.\d+\ssecond response time on '.$host_tcp_jabber.' port 5222/';
 
-my $jabberUnresponsive = '/CRITICAL\s-\sSocket timeout after\s\d+\sseconds/';
+my $jabberUnresponsive = '/CRITICAL\s-\sSocket timeout/';
 
 my $jabberInvalid = '/JABBER CRITICAL - Invalid hostname, address or socket:\s.+/';