Unify the list of tables processed by scripts

[nickkolok]

In two scripts (./db-copy.sh and ./rename-app.sh) there are lists of tables that should be processed in the DB, i.e. room, problem, team etc. According to DRY, they should be listed only once. Ideally, these scripts should treat all the tables with name IPTdev_modelname, where IPTdev is the name of the tournament and modelname is a name of model (that consists of non-capital Latin letters only). Note that tables like IPTdev_pf2_team should not be copied.

As a temporary solution, we can place a file (e.g. tables.txt) into the tournament dir (e.g. IPTdev) with the list of tables, but then we cannot put the comments there; however, we can place a script (e.g. ./list-tables.sh), but this seems to be an overkill.