Update to ReqMgr Oracle/CouchDB consistency tools

-description in the README file
-couchdb consistency checker and correction started
-couchdb dumper
-frequent running of Oracle, CouchDB database consistency (e.g. the same
number of requests in both databases) checker made easiler
Merge pull request #4497 from zdenekmaxa/reqmgr2-oracle-couch-consistency-checker

Update to ReqMgr Oracle/CouchDB consistency tools