Revert "WIKI-762 After each request, clear the cache containing Wiki page object to avoid getting data from dead session"

This reverts commit 72f43ae918a2ff1aab86820339ca957a9f6bc76b.
Revert "WIKI-740 WikiServiceImpl.getPageById invocation causes slowness"

This reverts commit 3bd18f292806b32c8cf00b29d0f661fee0fb76ad.
WIKI-762 cache only wiki page uuid instead of wiki page object to avoid getting data from dead session, get page by uuid instead of query page to improve performance