Fixed content tracker to limit concurrent commits.
Fixed delete to use "id" - better then delete by query which requires NRT reload
Fixed TX and Changeset in index detection
1) only check if it can be in the index based on timestamp
2) cache that should cover last hour recheck
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@87960 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
1c5eb6d44c