Fix sqlite memory req
Fix sqlite memory req

this is only used by test/requirements.py right now for the
profiling tests but it was not returning the correct answer
during a regenerate operation.

Change-Id: Id9747b4fe562b8bea9b21c465b626b1b19e6956b

graingert/sqlalchemy,j5int/sqlalchemy,j5int/sqlalchemy,sqlalchemy/sqlalchemy,monetate/sqlalchemy,monetate/sqlalchemy,graingert/sqlalchemy,zzzeek/sqlalchemy