New start-session command

[awick]

Make it easy to start a session to the task given a task arn. Not sure if start-session is the best name. Basically just take the arn and convert to the correct aws command. So
manage-arkime.py --profile foobar start-session --arn arn:aws:ecs:us-east-1:123:task/MyCluster-ViewerNodes-Cluster-XXX/12345

would be translated to aws --profile foobar --region us-east-1 ecs execute-command --cluster MyCluster-ViewerNodes-Cluster-XXX --task 12345 --interactive --command "/bin/bash"

Maybe there an aws command that already does this, but I couldn't find it. :)

Here is a perl implementation that hardcodes the profile, which the real version shouldn't. :)

#!/usr/bin/perl

use strict;

my @parts = split('/', $ARGV[0]);
my @parts2 = split(':', $parts[0]);
system (qq(aws --profile foobar --region $parts2[3] ecs execute-command --cluster $parts[1] --task $parts[2] --interactive --command "/bin/bash"));