[JSHooks] Add sfFee validation at Hook Install

[tequdev]

The following validation must be applied not only at the time of Hook creation but also at the time of Install.

                if (hookSetObj.isFieldPresent(sfFee) &&
                    isXRP(hookSetObj.getFieldAmount(sfFee)))
                {
                    STAmount amt = hookSetObj.getFieldAmount(sfFee);
                    uint64_t fee = amt.xrp().drops();
                    if (amt < beast::zero || fee < 1 || fee > 1000000)
                    {
                        JLOG(ctx.j.trace())
                            << "HookSet(" << hook::log::JS_FEE_TOO_HIGH << ")["
                            << HS_ACC()
                            << "]: Malformed transaction: When creating a JS Hook "
                            << "you must include a Fee <= 1000000.";
                        return false;

                    }
                }