get date and author

src/main/java/ru/ulstu/extractor/Commit.java

@@ -7,8 +7,11 @@ public class Commit {
     private Date date;
     private String author;
 
-    public Commit(String message) {
+    public Commit(String message, String author, Date date) {
         this.message = message;
+        this.author = author;
+        this.date = date;
+
     }
 
     public String getMessage() {

src/main/java/ru/ulstu/extractor/GitRepositoryService.java

@@ -11,7 +11,9 @@ import org.springframework.stereotype.Service;
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Path;
+import java.time.Instant;
 import java.util.ArrayList;
+import java.util.Date;
 import java.util.List;
 
 import static org.apache.logging.log4j.util.Strings.isBlank;
@@ -68,7 +70,10 @@ public class GitRepositoryService {
 
         List<Commit> list = new ArrayList<>();
         for (RevCommit commit : commits) {
-            Commit fullMessage = new Commit(commit.getFullMessage());
+            Commit fullMessage = new Commit(
+                    commit.getFullMessage(),
+                    commit.getAuthorIdent().getName(),
+                    Date.from(Instant.ofEpochSecond(commit.getCommitTime())));
             list.add(fullMessage);
         }