Don't close the sqlite database when reloading. Only close the database when unloading.

(closes issue #15953)
Reported by: frawd
Patches:
      sqlite3_rev220097.diff uploaded by frawd (license 610)
Tested by: frawd


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@223136 65c4cc65-6c06-0410-ace0-fbb531ad65f3