Remove git:// openstack references

This updates various parts of documentation to use https, rather than
git, which is not implemented by gitea

Change-Id: I8d2a93128dcdaba0a00b43d18652781733f90cf0
Story: #2004627
Task: #29701
diff --git a/README.rst b/README.rst
index 6885546..ad7ede4 100644
--- a/README.rst
+++ b/README.rst
@@ -38,7 +38,7 @@
 `stackrc` for the default set).  Usually just before a release there will be
 milestone-proposed branches that need to be tested::
 
-    GLANCE_REPO=git://git.openstack.org/openstack/glance.git
+    GLANCE_REPO=https://git.openstack.org/openstack/glance.git
     GLANCE_BRANCH=milestone-proposed
 
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