Create logger package and rename errorIf to LogIf (#5678)

Removing message from error logging
Replace errors.Trace with LogIf

cmd/object-api-multipart_test.go

@@ -1847,7 +1847,7 @@ func testObjectCompleteMultipartUpload(obj ObjectLayer, instanceType string, t T
 			},
 		},
 	}
-	s3MD5, err := getCompleteMultipartMD5(inputParts[3].parts)
+	s3MD5, err := getCompleteMultipartMD5(context.Background(), inputParts[3].parts)
 	if err != nil {
 		t.Fatalf("Obtaining S3MD5 failed")
 	}