Code cleanup


SearchOperation.java, SearchOperationBasis.java, SearchOperationWrapper.java:
Changed entriesSent and referencesSent from int to AtomicInteger.
Removed unused fields eclRequestControl, processingStartTime and processingStopTime.
Simplified constructors by initializing the fields during where they are declared.
Extracted method getACIHandler().
Removed incrementEntriesSent() and incrementReferencesSent().
Code cleanup.

Backend.java:
Removed unused code.
Removed ctor, initialized fields where they are declared.

WorkflowTopology.java:
Added toString().
Code cleanup.

git-svn-id: https://svn.forgerock.org/opendj/trunk@10978 41b1ffd8-f28e-4786-ab96-9950f0a78031
Checkpoint commit for OPENDJ-1206 : Create a new ReplicationBackend/ChangelogBackend 
 to support cn=changelog

* Implement checking of CHANGELOG_READ Privilege
* Implement 2 more tests for changelog backend. 
   Tests are still disabled (until changelog backend is activated in code).

* ChangelogBackend.java: 
 - add new method checkChangelogReadPrivilege() to check CHANGELOG_READ
  privilege
 
* ChangelogBackendTestCase.java: 
 - implement searchInCookieModeAfterDomainIsRemoved test
 - implement searchInCookieModeOnTwoSuffixesWithPrivateBackend test


git-svn-id: https://svn.forgerock.org/opendj/trunk@10979 41b1ffd8-f28e-4786-ab96-9950f0a78031