Fix remaining tests to work with new Timestamp type.

Change-Id: Ib0fb4e0b714d723e08e83283fbe95233fd0f987a

extraction/metricfamilyprocessor_test.go

@@ -17,12 +17,11 @@ import (
 	"sort"
 	"strings"
 	"testing"
-	"time"
 
 	"github.com/prometheus/client_golang/model"
 )
 
-var testTime = time.Now()
+var testTime = model.Now()
 
 type metricFamilyProcessorScenario struct {
 	in               string

extraction/processor0_0_1_test.go

@@ -19,13 +19,12 @@ import (
 	"path"
 	"sort"
 	"testing"
-	"time"
 
 	"github.com/prometheus/client_golang/model"
 	"github.com/prometheus/client_golang/test"
 )
 
-var test001Time = time.Now()
+var test001Time = model.Now()
 
 type testProcessor001ProcessScenario struct {
 	in               string

extraction/processor0_0_2_test.go

@@ -20,13 +20,12 @@ import (
 	"runtime"
 	"sort"
 	"testing"
-	"time"
 
 	"github.com/prometheus/client_golang/model"
 	"github.com/prometheus/client_golang/test"
 )
 
-var test002Time = time.Now()
+var test002Time = model.Now()
 
 type testProcessor002ProcessScenario struct {
 	in               string