SRCH-111 Replace old search impl with ElasticSearch

git-svn-id: https://source.sakaiproject.org/svn/search/trunk@118402 66ffb92e-73f9-0310-93c1-f5514f145a0a
SRCH-111 fix unit test and build...

git-svn-id: https://source.sakaiproject.org/svn/search/trunk@118405 66ffb92e-73f9-0310-93c1-f5514f145a0a