fixed comp issue

Author: ldetmer

google-cloud-spanner/src/main/java/com/google/cloud/spanner/connection/MutableCredentials.java

@@ -39,11 +39,11 @@ public class MutableCredentials extends Credentials {
   ServiceAccountCredentials delegate;
   List<String> scopes;
 
+
   public MutableCredentials(ServiceAccountCredentials credentials, List<String> scopes) {
-    public MutableCredentials(ServiceAccountCredentials credentials, List<String> scopes) {
-        this.scopes = new java.util.ArrayList<>(scopes);
-        delegate = (ServiceAccountCredentials) credentials.createScoped(this.scopes);
-    }
+      this.scopes = new java.util.ArrayList<>(scopes);
+      delegate = (ServiceAccountCredentials) credentials.createScoped(this.scopes);
+  }
   /**
    * Replaces the current delegate with a newly scoped credentials instance.
    *