Fix a couple imports and a float comparison test

plugins/system/ps/cpu/cpu_test.go

@@ -82,7 +82,7 @@ func testCPUPercent(t *testing.T, percpu bool) {
 			t.Errorf("error %v", err)
 		}
 		for _, percent := range v {
-			if percent < 0.0 || percent > 100.0*float64(numcpu) {
+			if percent < 0.0 || int(percent) > 100*numcpu {
 				t.Fatalf("CPUPercent value is invalid: %f", percent)
 			}
 		}

plugins/system/ps/docker/docker_linux.go

@@ -9,8 +9,8 @@ import (
 	"strconv"
 	"strings"
 
-	common "github.com/shirou/gopsutil/common"
-	cpu "github.com/shirou/gopsutil/cpu"
+	"github.com/influxdb/tivan/plugins/system/ps/common"
+	"github.com/influxdb/tivan/plugins/system/ps/cpu"
 )
 
 // GetDockerIDList returnes a list of DockerID.

plugins/system/ps/net/net_linux.go

@@ -6,7 +6,7 @@ import (
 	"strconv"
 	"strings"
 
-	common "github.com/shirou/gopsutil/common"
+	common "github.com/influxdb/tivan/plugins/system/ps/common"
 )
 
 // NetIOCounters returnes network I/O statistics for every network