connecting once is enough

fixes #3382

Author: Vladimir Kotal

plugins/src/main/java/opengrok/auth/plugin/ldap/LdapServer.java

@@ -268,7 +268,6 @@ private synchronized LdapContext connect() {
 
             try {
                 ctx = new InitialLdapContext(env, null);
-                ctx.reconnect(null);
                 ctx.setRequestControls(null);
                 LOGGER.log(Level.INFO, "Connected to LDAP server {0}", this.toString());
                 errorTimestamp = 0;