Cleanup heat/openstack/common

Remove jsonutils, strutils and timeutils modules.
They are not tracked in openstack-common.conf.
First two were not used anywhere, and single usage of timeutils is fixed
to use oslo.utils.

Change-Id: I368728e486bc7b05c0768df17123a0efad078efb
1 file changed
tree: 70e8da8e67e2ab0fdcd19ab0374b21b6da8e428e
  1. common/
  2. functional/
  3. scenario/