Updated MySQL server to use InnoDB

I updated the MySQL server configuration section to use the InnoDB
storage engine by default. This key has no impact on MySQL 5.5 which
already uses InnoDB by default.

Change-Id: I5a0d60e8e38488861ec53b9032cfc764accc3dbf
Closes-Bug: #1299480

doc/install-guide/ch_basics.xml

@@ -414,10 +414,11 @@ bind-address = 192.168.0.10</programlisting>
               </step>
               <step>
                 <para>Under the <literal>[mysqld]</literal> section, set the
-                  following keys to enable the UTF-8 character set by
-                  default:</para>
+                  following keys to enable InnoDB, UTF-8 character set, and
+                  UTF-8 collation by default:</para>
                 <programlisting>[mysqld]
 ...
+default-storage-engine = innodb
 collation-server = utf8_general_ci
 init-connect = 'SET NAMES utf8'
 character-set-server = utf8</programlisting>