[Libreoffice] prevent the creation of lockfiles during unit tests

[Stephan Bergmann]

On 01/13/2012 05:08 AM, Markus Mohrhard wrote:
> I did not push that patch directly because I'm not sure if we really
> want to introduce another registry entry for this.

After seeing the patch pushed, it occurred to me that we usually use env 
vars (instead of configuration settings etc.) to control debug-only 
features in the code.  But probably fine anyway, either way.

Stephan