Revert "[SPARK-4075] [Deploy] Jar url validation is not enough for Jar file"

This reverts commit 098f83c7ccd7dad9f9228596da69fe5f55711a52.
Revert "[maven-release-plugin] prepare for next development iteration"

This reverts commit 685bdd2b7e584c84e7d39e40de2d5f30c5388cb5.
Revert "[maven-release-plugin] prepare release v1.1.1-rc1"

This reverts commit 72a4fdbe82203b962fe776d0edaed7f56898cb02.
[SPARK-4467] Partial fix for fetch failure in sort-based shuffle (1.1)

This is the 1.1 version of #3302. There has been some refactoring in master so we can't cherry-pick that PR.

Author: Andrew Or <andrew@databricks.com>

Closes #3330 from andrewor14/sort-fetch-fail and squashes the following commits:

486fc49 [Andrew Or] Reset `elementsRead`