Version 2.15.0-268.8.beta

* Cherry-pick 243fb5c383416fb82b6852a83ad3c4449683858a to beta
* Cherry-pick 1ca06b953112612cd6250d2b11bb776688ec8e1a to beta
* Cherry-pick b8e419d16b10be073f080192a55aaf598321ca10 to beta
* Cherry-pick dc7e082336fc7a9c639c1d62edf4cc0ebb57ea51 to beta
* Cherry-pick 6225f46b760a5c1eebff9c4dce621e93192a886c to beta
* Cherry-pick b97737c3b53a6c043a6a1b97e61b8670ded75629 to beta
* Cherry-pick 109c317ac12a43d8a25b14bca9805276bf8c84ee to beta
diff --git a/tools/VERSION b/tools/VERSION
index d18afdd..53fe3f8 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -28,4 +28,4 @@
 MINOR 15
 PATCH 0
 PRERELEASE 268
-PRERELEASE_PATCH 1
\ No newline at end of file
+PRERELEASE_PATCH 8
\ No newline at end of file