Switch GIT_BASE to https://

Infra are looking at implementing gitea for serving git, but this does
not have a git protocol handler ATM.  Switch GIT_BASE, and some
testing, to https:// to be in a better position to handle this.

Change-Id: I97a7b0de7b1ec2dd15d15c58699a631b09273df1
Story: #2004627
Task: #29701
diff --git a/stackrc b/stackrc
index 53868f3..652f2de 100644
--- a/stackrc
+++ b/stackrc
@@ -237,8 +237,7 @@
 # ------------
 
 # Base GIT Repo URL
-# Another option is https://git.openstack.org
-GIT_BASE=${GIT_BASE:-git://git.openstack.org}
+GIT_BASE=${GIT_BASE:-https://git.openstack.org}
 
 # The location of REQUIREMENTS once cloned
 REQUIREMENTS_DIR=$DEST/requirements