Regenerate sitemap.xml to exclude juno and icehouse content
Regenerate sitemap.xml to exclude juno and icehouse content

Docs for juno and icehouse should not be accessd, so this updates the
sitemap.xml file to remove them.

Change-Id: I75eb0f57e4899b20467393719e32e3cf2f94153c
Closes-Bug: #1602647

AlekhyaMallina-Vedams/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals