See thread starting at
  https://lists.freedesktop.org/archives/libreoffice/2018-December/081589.html

Regression from commit 7263d223.
That change has made unit tests DPI-aware; and then some tests started
failing on systems with resolutions other than 96 DPI.
It has been suggested that the proper fix would be to do for Windows
what commit ada20402 did for macOS.
Another approach would be to fix all the tests to be DPI-aware.
I cannot do the first mentioned fix; so I have fixed testFDO74215 test
in sw_ooxmlexport4; and added DPI checks to the other failing tests in
chart2_xshape and sc_subsequent_filters_test to skip testing when using
non-default DPI. This is not ideal, of course, and conditionally skipped
tests need to be re-enabled unconditionally once a proper fix arrives.

Change-Id: I5c92cfe93ae65f53a8a180fcaec49231df377b8a
Reviewed-on: https://gerrit.libreoffice.org/65595Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
Tested-by: Mike Kaganski <mike.kaganski@collabora.com>
(cherry picked from commit 9520378e)
Reviewed-on: https://gerrit.libreoffice.org/71356
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>