Support new version of slider - 0.81.1-incubating

[kokosing]

No description provided.

[anusudarsan]

I tried testing slider 0.81.1 and got issues with YARN labels. I addressed it to the Slider team and they fixed it as a part of https://issues.apache.org/jira/browse/SLIDER-1051. The fix is in 0.91 which they are going to release soon. 0.91 also has other nice features like Anti-Affinity placement which will probably help us with Issue #22. But they also expect some instability around that code since this is the first release with the anti-affinity changes and they also seem to have changed the logic for placement policies in general.

So I have asked them if they can port the fix for SLIDER-1051 to 0.81 branch, so that we don't have to do the big upgrade from 0.80 to 0.91 (at least till they have a stable 0.91)

[anusudarsan]

Slider 0.91 has Anti-Affinity feature and SLIDER-1051 resolved.