Don't dispose twice in CalcUnoApiTest::tearDown

...i.e., skip UnoApiTest::tearDown's dispose of mxDesktop and go directly to
BootstrapFixture::tearDown.

Change-Id: If4555c812cb42c4b76a36d4e59c1d96211915dba
The ScOutlineObj test still requires the fugdge

...that got moved from UnoApiTest to CalcUnoApiTest in
a071a29d4f7e8065a36a313027a007edac102e20 "UnoApiTest don't require Calc."

Change-Id: I1a38c496ef2baf42b5fd82ff653e822a8b80a124