FE Port Metrics

Unisphere Metric	Splunk Formatted Metric	Is KPI
`AvgIOSize`	`avg_io_size`	True
`IOs`	`ios`	True
`MBRead`	`mb_read`	True
`MBWritten`	`mb_written`	True
`MBs`	`mbs`	True
`MaxSpeedGBs`	`max_speed_gbps`	False
`PercentBusy`	`percent_busy`	True
`ReadResponseTime`	`read_response_time`	True
`Reads`	`reads`	True
`ResponseTime`	`response_time`	True
`SpeedGBs`	`speed_gbs`	True
`WriteResponseTime`	`write_response_time`	True
`Writes`	`writes`	True