Update plural rules for Hebrew

A recent CLDR update changed the plural rules for Hebrew
and added a "many" form. That rule has a mistake, however -
it is not supposed to include the number 10. This is reported as
http://unicode.org/cldr/trac/ticket/5828

This commit updates the plural overrides for Hebrew and makes
them closer to the latest CLDR, but with a fix for that rule.

It also updates the tests to include support for the new rule
and to make sure that the right fallbacks are used when
less than four rules are supplied, because usually that is
the case. It is thus a partial revert of the changes introduced
in I3d72e4105f6244b0695116940e62a2ddef66eb66 .

Mingle-Task: 2715

Change-Id: I1315e6900ef7a89bf246e748b786f7fc31a629c6
Merge "Update plural rules for Hebrew"