webadmin: Attempt to add a 3.2 host into 3.3 env fails but the host cannot be removed

In addition to the change I407154df67d51f28117f7aaf51f8030e39934678
the constant should also be added to LocalizedEnums.java in order to fix
the bug correctly

Change-Id: Iae24a99ea6b7f6df5586f638aefabdd20164e82f
Bug-Url: https://bugzilla.redhat.com/1004675
Signed-off-by: Tal Nisan <tnisan@redhat.com>