iocost_monitor: drop string wrap around numbers when outputting json

    def dict(self, now):

        return { 'device'               : devname,

                 'timestamp'            : str(now),

                 'enabled'              : str(int(self.enabled)),

                 'running'              : str(int(self.running)),

                 'period_ms'            : str(self.period_ms),

                 'period_at'            : str(self.period_at),

                 'period_vtime_at'      : str(self.vperiod_at),

                 'busy_level'           : str(self.busy_level),

                 'vrate_pct'            : str(self.vrate_pct), }

                 'timestamp'            : now,

                 'enabled'              : self.enabled,

                 'running'              : self.running,

                 'period_ms'            : self.period_ms,

                 'period_at'            : self.period_at,

                 'period_vtime_at'      : self.vperiod_at,

                 'busy_level'           : self.busy_level,

                 'vrate_pct'            : self.vrate_pct, }

    def table_preamble_str(self):

        state = ('RUN' if self.running else 'IDLE') if self.enabled else 'OFF'

    def dict(self, now, path):

        out = { 'cgroup'                : path,

                'timestamp'             : str(now),

                'is_active'             : str(int(self.is_active)),

                'weight'                : str(self.weight),

                'weight_active'         : str(self.active),

                'weight_inuse'          : str(self.inuse),

                'hweight_active_pct'    : str(self.hwa_pct),

                'hweight_inuse_pct'     : str(self.hwi_pct),

                'inflight_pct'          : str(self.inflight_pct),

                'debt_ms'               : str(self.debt_ms),

                'use_delay'             : str(self.use_delay),

                'delay_ms'              : str(self.delay_ms),

                'usage_pct'             : str(self.usage),

                'address'               : str(hex(self.address)) }

                'timestamp'             : now,

                'is_active'             : self.is_active,

                'weight'                : self.weight,

                'weight_active'         : self.active,

                'weight_inuse'          : self.inuse,

                'hweight_active_pct'    : self.hwa_pct,

                'hweight_inuse_pct'     : self.hwi_pct,

                'inflight_pct'          : self.inflight_pct,

                'debt_ms'               : self.debt_ms,

                'use_delay'             : self.use_delay,

                'delay_ms'              : self.delay_ms,

                'usage_pct'             : self.usage,

                'address'               : self.address }

        for i in range(len(self.usages)):

            out[f'usage_pct_{i}'] = str(self.usages[i])

        return out