waiting for the OLT to go down in OLT soft reboot tests

Change-Id: I438fca46d2e9096d8cca541d59809ba3082b3a4b
diff --git a/VERSION b/VERSION
index 49cdd66..1f7da99 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.7.6
+2.7.7