Fix issue with Gerrit Trigger PatchSet created excludes

The Gerrit Trigger plugin since 2.12.0 now supports some new fields for
the patchset created event trigger for excluding retriggering for
changes where drafts, trivial rebase, or no code changes were submitted.

It seems by default these fields are set to true so JJB which does not
set these fields causes the build to unexpectedly not retrigger for
these cases.

Change-Id: Iefd3ac10fcef075317ccc658f46ab3369329cff5
Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>