update table definitions, add define of DB_NAME and use it in perf
Merge branch 'master' of github.com:mercadolibre/arquitectura-perf
rename connection variable
reconnect on query fail
add retry to mysql queries and add exit function
Merge branch 'master' of github.com:mercadolibre/arquitectura-perf

Conflicts:
	src/create_database.sh
Merge branch 'mysql_reconnect'