Updates hydra: a8b706c Provision: fix reboot_device

diff --git a/hydra b/hydra
index 5b3da19575e06cd21b89f66b4e01bfc5c7181bc7..a8b706ccdab40635d7a48bcc85df3176cd24c0d8 160000 (submodule)
--- a/hydra
+++ b/hydra
@@ -1 +1 @@
-Subproject commit 5b3da19575e06cd21b89f66b4e01bfc5c7181bc7
+Subproject commit a8b706ccdab40635d7a48bcc85df3176cd24c0d8