Consider decreasing the inter_msg_pause

Currently the driver leaves a gap of 1 ms between CAN msgs sent to the PACMod. The PACMod protocol documentation suggests this pause should be more like 0.5 ms:
https://github.com/astuff/pacmod_dbc/blob/11.6.0/doc/user_can_protocol.md#rules-for-transmitting-can-messages

Determine what this pause should actually be.