Fixes 60 - off and cycle

`power off` and `power cycle` had `Args: cobra.MinimumNArgs(1)` set. This was previously removed for several other commands because it broke piping.

When piping occurs, at least with how `gru` accepts piped arguments, the `args[]` slice is empty. In order for piping to work, we can not set a minimum number of arguments.

There may be another way to handle piping, assuming there's a way to get in front of Cobra.

pkg/cmd/cli/chassis/power/cycle.go

@@ -43,7 +43,6 @@ func NewPowerCycleCommand() *cobra.Command {
 		Short: "Power cycle the target machine(s)",
 		Long: `Performs an ACPI shutdown and startup to power cycle the target machine(s).
 Also allows bypassing the OS shutdown, forcing a warm boot.`,
-		Args: cobra.MinimumNArgs(1),
 		Run: func(c *cobra.Command, args []string) {
 			var resetType redfish.ResetType
 

pkg/cmd/cli/chassis/power/off.go

@@ -44,7 +44,6 @@ func NewPowerOffCommand() *cobra.Command {
 		Long: `Powers off the target machine(s) with an ACPI shutdown.
 Permits forcing a shutdown (without waiting for the OS),
 as well as a power-button emulated shutdown.`,
-		Args: cobra.MinimumNArgs(1),
 		Run: func(c *cobra.Command, args []string) {
 			var resetType redfish.ResetType