scrooge: Fix the travis build by properly setting SKIP_FLAKY
scrooge: Fix the travis build by properly setting SKIP_FLAKY

Problem

scrooge builds have been failing because they don't respect SKIP_FLAKY

Solution

Pass in SKIP_FLAKY directly.

RB_ID=910811

twitter/scrooge,twitter/scrooge,twitter/scrooge,twitter/scrooge