jaqlscenario: avoid re-initing all the time
jaqlscenario: avoid re-initing all the time

Make sure mserver5 also knows the client was already initialised, so we
don't a) leak like mad for every query, and b) can actually store and
recall variables.

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb