[5.3] change to loosey comparison to allow queue to run without --tries

[bronxct1]

Fixes the issue where running php artisan queue:listen marks jobs failed unless --tries=1

The issue is referenced in #15319

[GrahamCampbell]

Surely we just need to set a correct default in the command. This fix doesn;t look correct?

[taylorotwell]

Let's just revert the broken commit.

[GrahamCampbell]

NB, this PR has just been reverted.

[larsbo]

Instead of switching back to loose comparing the parameters should be casted to int at the correct position. E.g. Instead doing it here: https://github.com/laravel/framework/blob/5.3/src/Illuminate/Queue/Worker.php#L242
casting may take place here: https://github.com/laravel/framework/blob/5.3/src/Illuminate/Queue/Console/ListenCommand.php#L98
See issue #15370 for more details.

[GrahamCampbell]

@larsbo yeh, we already did this