[Core] DB Scripts SCRIPT_COMMAND_EMOTE

Add support to display a random emote. If dataint1..dataintX
is set to an emote, a random out of datalong1, dataint1..
dataintX will be used as displayed emote.

Based on cmangos/mangos-wotlk@a9332b5e05

Signed-off-by: Daniel S. Reichenbach <daniel@kogitoapp.com>