make rebaseline_server client check schema version number

(SkipBuildbotRuns)
NOTREECHECKS=True
NOTRY=True
R=rmistry@google.com

Author: epoger@google.com

Review URL: https://codereview.chromium.org/195763013

git-svn-id: http://skia.googlecode.com/svn/trunk@13792 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed