fallbackVastTags may not be working

[gibigate]

To Reproduce
Just try this option yourself, it's not working with empty vast, broken vast or incorrect vast url
The player doesn't even try to load some URL from fallbackVastTags

Expected behavior
If vastTag empty or broken or failed when loading, fluidplayer should try to load URLs from fallbackVast

example:

{
    roll: 'preRoll',
    vastTag: "some vast url with error or empty or incorrect url",
    fallbackVast : [correct_vast1, correct_vast2],
}

[biguz]

also saw this issue

[sergiomcsousa]

An internal ticket was created to take care of this issue. Thank you!