Update common-packer to v0.5.2

Fetch lastest support for CentOS 8 builds
Fetch "Fix provisioner to install Git 2 from IUS"

Issue-ID: CIMAN-33
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
Change-Id: Idb907705a6d49ff46f9b8261c5cc6235b56e2e8c

diff --git a/packer/common-packer b/packer/common-packer
index da5d5cf..2b8bd41 160000 (submodule)
--- a/packer/common-packer
+++ b/packer/common-packer
@@ -1 +1 @@
-Subproject commit da5d5cf92fafcdc0f31a76d2955e8ac9c327c100
+Subproject commit 2b8bd41cbf7e3d5faaa90fba9da1a07fdf967ea9