Add explanation to setup about default admin password

Add explanation to setup about default admin password
https://igniterealtime.org/issues/browse/OF-1016

src/i18n/openfire_i18n_en.properties

@@ -1785,8 +1785,9 @@ setup.env.check.doc=Please read the installation documentation and try setting u
 setup.admin.settings.account=Administrator Account
 setup.admin.settings.info=Enter settings for the system administrator account (username of "admin") \
         below. It is important to choose a password for the account that cannot be easily guessed -- \
-        for example, at least six characters long and containing a mix of letters and numbers. You \
-        can skip this step if you have already setup your admin account (not for first time users).
+        for example, at least eight characters long and containing a mix of letters and numbers. You \
+        can skip this step if you have already setup your admin account. if you skip this step during \
+        the new installation, the default password would be "admin".
 setup.admin.settings.ldap.info=Choose one or more users from your LDAP directory to be administrators by \
     entering their usernames.
 setup.admin.settings.error=There were errors when updating the admin account. Please see below.