add url and fallback path to imported repo

src/de/uni_passau/fim/seibt/gitwrapper/repo/GitWrapper.java

@@ -132,7 +132,16 @@ public class GitWrapper extends ToolWrapper {
             return Optional.empty();
         }
 
-        return Optional.of(new Repository(this, "", directory));
+        Optional<ExecRes> result = exec(directory, "config", "--get", "remote.origin.url");
+        Optional<String> url = result.map(res -> {
+            String repoUrl = null;
+            if (this.failed(res) || (repoUrl = res.stdOut.trim()).isEmpty()) {
+                // there was no remote url
+                repoUrl = directory.getAbsolutePath();
+            }
+            return repoUrl;
+        });
+        return Optional.of(new Repository(this, url.orElse(""), directory));
     }
 
     /**