ReqMgr2 - Oracle, CouchDB database cleanup

-utils for Oracle dump, Oracle vs. CouchDB consistency comparison
-CouchDB requests cleanup
-temporary logs and notes, all helpful before dropping Oracle for ReqMgr2
Merge pull request #4351 from zdenekmaxa/reqmgr2-databasecleanup

ReqMgr2 - Oracle, CouchDB database cleanup
Open requests feature

Mostly done, finishing up unit tests and still missing a live test.
Unit tests ready. Time to a live test.