Remove /tmp/memo from OMEROWrapper (Fix #10836)

The /tmp/memo directory was still present on the one
testing server that the plate import was not working
on which led to plates not being imported. Moving the
directory away allowed plates to be imported. My guess
is that this will fix the issue.
Merge pull request #1208 from joshmoore/10836-tmp-memo

Remove /tmp/memo from OMEROWrapper (Fix #10836)