OmeroCpp: Disable rtypes RMap test
OmeroCpp: Disable all integration search tests
Expand getPlane to allow initialized raw pixels store as an input

When retrieving a large number of planes, initializing a store at each call
is at the detriment of efficiency. This commit allows the user to pass a fully
initialized raw pixels store to getPlane, retrieve the pixels data and keep
the store active.
Fix missing variable assignment
Add both signatures of getPlane to the training example

Add a time elapsed measurement for efficiency comparison
Disable MTPixelDataTest for now

gh-3023 enabled unit tests for several OMERO components. Initial runs
of MTPixelDataTest passed on travis and on 2 different workstations.
Now, the NPE which was seen on one work station is "infecting" travis
as well. Disabling the test for now.
Merge pull request #3030 from joshmoore/disable-mt-pixel-test

Disable MTPixelDataTest for now
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only: PR 2835 (Update OmeroPy/src/path.py)
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only: PR 2895 (Reload groups after users added/removed)
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only: PR 2970 (Bugfixes for 5 0 4)
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only: PR 2994 (Ensure that identity request variables are UTF-8 encoded)
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only: PR 3004 (Update webadmin_utils.py with downloads.o.org link instead of trac.o.org )
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only: PR 3005 (Rendering settings unification)
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only: PR 3010 (cmake: Use embedded gtest from bioformats)
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only: PR 3018 (Update develop submodules)
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only: PR 3019 (refactoring settings.py)
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only: PR 3020 (adding web settings parser)
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only: PR 3025 (Preview panel 2)
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only: PR 3027 (Fix: Instantly apply text color change)
merge develop -Dorg -Ijburel/openmicroscopy:qa-submit-new -Ssuccess-only: PR 3028 (Matlab getPlane efficiency)