[lcl] get only market valuation for market account not liquidity

Same "compte de dépôts" on LCL website are visible on AccountsPage and BoursePage
In BoursePage, there are 2 columns: "Solde espèce" and "Valorisation titres"
Column "Solde espèces" = balance on AccountsPage + overdraft authorization
Column "Valorisation titres" = value-creation on "compte de dépôts" equities
Boobank has to get only "Valorisation titres" column for market accounts
because liquidities are already in checking accounts