LSNBLDR-440; add support code for loading Common Cartridge through Site Info


git-svn-id: https://source.sakaiproject.org/svn/lessonbuilder/trunk@315031 66ffb92e-73f9-0310-93c1-f5514f145a0a
LSNBLDR-440; include test cartridge, to simply testing


git-svn-id: https://source.sakaiproject.org/svn/lessonbuilder/trunk@315033 66ffb92e-73f9-0310-93c1-f5514f145a0a