Add "Configure Columnstore for UTF-8 usage ?" in the install script

UTF-8 support will be more important and many assumed , that UTF-8 works out of the Box.
In reality the steps described in the section
"Configuring to use UTF-8 Character sets" is necessary.

Default installation behaviour is the same, but UTF-8

Configure Columnstore for UTF-8 usage ? [Y, N] (N) ?

If "Y" Install script add

default-character-set=utf8

to [client] section to
/usr/local/mariadb/columnstore/mysql/my.cnf.d/client.cnf

character-set-server=utf8

collation-server=utf8_general_ci

init-connect=’SET NAMES utf8’

to [mysqld] section to
/usr/local/mariadb/columnstore/mysql/my.cnf.d/server.cnf

to [client] section in
/usr/local/mariadb/columnstore/mysql/my.cnf.d/client.cnf

And change <SystemLang> Value from "C" to "en_US.utf8"

<SystemConfig>

   <SystemLang>en_US.utf8</SystemLang>