[PATCH][LNT] Fix upgrade_3_to_4 and upgrade_4_to_5 to also work on Postgres

[Chris Matthews]

I ran into this problem on our Postgres server.  We do have a flag in the test suite to enable Postgres tests, I think I might be the only person who tests that regularly though.

> On May 11, 2015, at 8:31 AM, James Molloy <James.Molloy at arm.com> wrote:
> 
> Hi Kristof,
> 
> Have you run this through the LNT regression tests? Quoting is difficult to get right on all platforms (it’s a real pity our DBMS layer couldn’t deal with that query!)
> 
> If it passes the migration regression tests, it LGTM.
> 
> James
> 
> On 11 May 2015, at 16:02, Kristof Beyls <kristof.beyls at arm.com> wrote:
> 
>> <lnt_quote_names.diff>
> 
> 
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