Updates hydra: 4a247c0 Deploy: set --homedir=/root/.gnupg when testing for gpg keys

diff --git a/hydra b/hydra
index f60735f7e038d665727741f2386ee6b0d5e7a2e0..4a247c0948fb2920015a5352cd950f7aec695451 160000 (submodule)
--- a/hydra
+++ b/hydra
@@ -1 +1 @@
-Subproject commit f60735f7e038d665727741f2386ee6b0d5e7a2e0
+Subproject commit 4a247c0948fb2920015a5352cd950f7aec695451