* get_handlers_rs() is renamed into get_file_handles() and
reworked from an indented 'from' resultset into 2 separate
resultsets, one fetching all the handles and another one
files for the sound set, it is now returned as an array with the
similar data. Reason for this rework is the deprecated use of
'from', that resulted in a lot of warnings in panel-fcgi.log:
DBIx::Class::SQLMaker::ClassicExtensions::_join_condition():
ResultSet {from} structures with conditions not conforming to the
SQL::Abstract::Classic syntax are deprecated: you either need to
stop abusing {from} altogether, or express the condition properly
using the { -ident => ... }
* adjust file_handles data key names to better follow the
naming conventions and readability, e.g.: groupname -> group_name,
fileid -> file_id
Change-Id: Ia91c9104c0b4dc79ee5bc359eb0b6e035e56ef3e
Kirill Solomko