webtry: Improve error handling/message when creating sqlite tables.
webtry: Improve error handling/message when creating sqlite tables.

In case they fail, lets fail with an ERROR message rather than an INFO,
and lets make the error message a little bit better.

BUG=None
TEST=None
R=jcgregorio@google.com

Review URL: https://codereview.chromium.org/669643004

google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,google/skia-buildbot