[REVIEW 3-6] fdo#53246 Fresh postgresql-sdbc implementation names

Besides the general problem of LO 3.6 not starting due to duplicate UNO 
implementations caused by the bundled extension prereg mechanism, there 
are also reports for a more specific problem of not starting due to 
duplicate UNO implementations of 
org.openoffice.comp.connectivity.pq.Driver, 
<https://bugs.freedesktop.org/show_bug.cgi?id=53246> "Libo36 does not 
start, InvalidRegistryException from 
program/services/postgresql-sdbc.rdb."  This appears to be caused by an 
old postgresql-sdbc-*.oxt installed per-user or shared 
(<http://wiki.documentfoundation.org/PostgreSQL-SDBC>) while the same 
functionality is included as a non-extension today 
(<http://cgit.freedesktop.org/libreoffice/core/commit/?id=c97d74b5f0608866bad3f7ae943811bdff4f7986> 
"fdo#45090: Changed postgresql-sdbc from bundled oxt to proper optional 
part.").

<http://cgit.freedesktop.org/libreoffice/core/commit/?id=f50a41437ee99aee499dbabd1d36ef8197db5559> 
"fdo#53246 Fresh postgresql-sdbc implementation names" works around that 
on master, with a rather trivial patch of choosing new names for the 
relevant UNO implementations.  I verified that it does not break things 
with the instructions from 
<http://lists.freedesktop.org/archives/libreoffice/2012-January/024333.html> 
"[Libreoffice] [PATCH] rpath / ... for extensions (and the case of 
PostgreSQL-SDBC)."

Please review and consider for backporting to libreoffice-3-6.

Thanks,
Stephan