Client-side time out occurs before server-side time out

[acotiuga]

Using an invalid host 5.135.240.218 the server side response is a timeout but the client-side time-out happens faster so the exception is not catch and thrown soon enough to get the error in UI.
At the same time, another invalid host 127.0.0.1s gives a faster response so the time-out can be reported in UI.
The case of 5.135.240.218 needs a deeper investigation.

Caused by: LDAPException: Unable to connect to server 5.135.240.218:6,389 (91) Connect Error
java.net.ConnectException: Connection timed out (Connection timed out)
	at com.novell.ldap.Connection.connect(Connection.java:476)
	at com.novell.ldap.Connection.connect(Connection.java:408)
	at com.novell.ldap.LDAPConnection.connect(LDAPConnection.java:2163)
	at org.xwiki.contrib.ldap.XWikiLDAPConnection.connect(XWikiLDAPConnection.java:245)
	at org.xwiki.contrib.ldap.XWikiLDAPConnection.open(XWikiLDAPConnection.java:212)
	... 216 more
Caused by: java.net.ConnectException: Connection timed out (Connection timed out)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:607)
	at java.net.Socket.connect(Socket.java:556)
	at java.net.Socket.<init>(Socket.java:452)
	at java.net.Socket.<init>(Socket.java:229)
	at com.novell.ldap.Connection.connect(Connection.java:457)
	... 220 more