[repoapi] move get_repository function into a new repoapi module
This new module aims to host the function of the new API replacing the old
DBAPI. `get_repository` is still needed hence moved to the new module.
Related to #2503918
import ConfigParser
try:
undo_actions = config.cfgfile_parser.get('MAIN', 'undo-support', False)
except ConfigParser.NoOptionError:
pass # this conf. file was probably already migrated
else:
config.global_set_option('undo-enabled', bool(undo_actions))