Rename a missed enum and a bit more (facebookincubator#9549)

Summary:
X-link: facebookincubator/nimble#30

X-link: prestodb/presto#22577

Pull Request resolved: facebookincubator#9549

Found some enums that were left behind during the rename.

Reviewed By: sdruzkin

Differential Revision: D56370309

fbshipit-source-id: 24b76bd948778091ec12bdbee9138f108be51b07

velox/dwio/common/Options.cpp

@@ -36,8 +36,8 @@ FileFormat toFileFormat(std::string s) {
     return FileFormat::JSON;
   } else if (s == "parquet") {
     return FileFormat::PARQUET;
-  } else if (s == "alpha") {
-    return FileFormat::ALPHA;
+  } else if (s == "nimble") {
+    return FileFormat::NIMBLE;
   } else if (s == "orc") {
     return FileFormat::ORC;
   }
@@ -60,8 +60,8 @@ std::string toString(FileFormat fmt) {
       return "json";
     case FileFormat::PARQUET:
       return "parquet";
-    case FileFormat::ALPHA:
-      return "alpha";
+    case FileFormat::NIMBLE:
+      return "nimble";
     case FileFormat::ORC:
       return "orc";
     default:

velox/dwio/common/Options.h

@@ -45,7 +45,11 @@ enum class FileFormat {
   TEXT = 5,
   JSON = 6,
   PARQUET = 7,
+#ifdef VELOX_ENABLE_BACKWARD_COMPATIBILITY
   ALPHA = 8,
+#else
+  NIMBLE = 8,
+#endif
   ORC = 9,
 };