Revert "Update redis from 2.10.6 to 3.0.1 (#4296)"
Revert "Update redis from 2.10.6 to 3.0.1 (#4296)"

This reverts commit 3295915d57966baca24f2483d0978a7442f275d8,
due to bug 1510000.

KWierso/treeherder,edmorley/treeherder,KWierso/treeherder,edmorley/treeherder,edmorley/treeherder,KWierso/treeherder,KWierso/treeherder,edmorley/treeherder