SAK-23513 fixing StringBuilder appends per AZ


git-svn-id: https://source.sakaiproject.org/svn/kernel/trunk@130210 66ffb92e-73f9-0310-93c1-f5514f145a0a
KNL-1125 Expose existing method to lookup siteIds through the public UI (for when sites are not needed)
NOTE: API addition to SiteService



git-svn-id: https://source.sakaiproject.org/svn/kernel/trunk@130212 66ffb92e-73f9-0310-93c1-f5514f145a0a