Bug 17911: Message and timeout mismatch

The installation step 3 has a meta refresh of 10 seconds,
but the message says 5 seconds. People could get impatient.

TEST PLAN
---------
1) Fresh install
   -- notice the discrepancy on the web installation.
2) drop and create the DB
3) apply the patch
4) run the web install
   -- notice it refreshes faster (5 seconds vs 10 seconds)
5) run koha qa test tools

Works as intended and passes qa test tool
 OK koha-tmpl/intranet-tmpl/prog/en/modules/installer/step3.tt
  OK    forbidden patterns
  OK     git manipulation
  OK      spelling
  OK   tt_valid
  OK    valid_template

Signed-off-by: Alex Buckley <alexbuckley@catalyst.net.nz>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit 46d0be3114)
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>

koha-tmpl/intranet-tmpl/prog/en/modules/installer/step3.tt

@@ -1,5 +1,5 @@
 [% INCLUDE 'doc-head-open.inc' %]<title>Koha &rsaquo; Web installer &rsaquo; Step 3</title>
-[% IF ( finish ) %]<meta http-equiv="refresh" content="10; url=/cgi-bin/koha/mainpage.pl">[% END %]
+[% IF ( finish ) %]<meta http-equiv="refresh" content="5; url=/cgi-bin/koha/mainpage.pl">[% END %]
 [% INCLUDE 'installer-doc-head-close.inc' %]
 <div>
 <h1 id="logo"><img alt="Koha" src="[% interface %]/[% theme %]/img/koha.org-logo.gif" /> Web installer &rsaquo; Step 3</h1>