Certificate Transparency: Properly initializing test objects

The test SCT returned did not have its version field initialized.
That made valgrind unhappy.

TBR=wtc@chromium.org
BUG=327619

Review URL: https://codereview.chromium.org/102513004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240118 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240118