Get a Cmdr instance with prepopulated locs

async def getItemCmdr(prox, outp=None, locs=None):
    '''Get a Cmdr instance with prepopulated locs'''
    cmdr = await s_cmdr.getItemCmdr(prox, outp=outp)
    cmdr.echoline = True
    if locs:
        cmdr.locs.update(locs)
    return cmdr