This leads to deadlocks if one thread is using the process factory
while holding the SolarMutex and another thread is calling the
BackingComp::getTypes method.

Change-Id: Ib4750aa1ebbfbf4f8dcd09ec2a218202450f4928
Reviewed-on: https://gerrit.libreoffice.org/49940Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>