test,iosched: Run tests by their names
test,iosched: Run tests by their names

The selected sub-parser is currently unused, because there's only
one test case in the script. This patch makes use of the sub-parser
name by registering all cases in a dict and running it from chosen
sub-parser.

Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@scylladb.com>

syuu1228/seastar,avikivity/seastar,avikivity/seastar,scylladb/seastar,syuu1228/seastar,avikivity/seastar,scylladb/seastar,scylladb/seastar,syuu1228/seastar