Drop more seeding in tests (#1942)

Related #1934

Author: ferhatelmas

core_test.go

@@ -381,9 +381,6 @@ func TestCoreCopyObject(t *testing.T) {
 		t.Skip("skipping functional tests for short runs")
 	}
 
-	// Seed random based on current time.
-	rand.Seed(time.Now().Unix())
-
 	// Instantiate new minio client object.
 	c, err := NewCore(
 		os.Getenv(serverEndpoint),
@@ -507,9 +504,6 @@ func TestCoreCopyObjectPart(t *testing.T) {
 		t.Skip("skipping functional tests for short runs")
 	}
 
-	// Seed random based on current time.
-	rand.Seed(time.Now().Unix())
-
 	// Instantiate new minio client object.
 	c, err := NewCore(
 		os.Getenv(serverEndpoint),
@@ -663,9 +657,6 @@ func TestCorePutObject(t *testing.T) {
 		t.Skip("skipping functional tests for short runs")
 	}
 
-	// Seed random based on current time.
-	rand.Seed(time.Now().Unix())
-
 	// Instantiate new minio client object.
 	c, err := NewCore(
 		os.Getenv(serverEndpoint),