ReqMgr cloned requests priority fix

When cloning a request which had changed priority, the newly cloned request
priority is on default values. Fixes goes via MakeRequest.createRequest() to
database DAOs Request/New.py
Also reqmgr.py checks the case.

Modified default value SoftTimeout on Ops request.
Merge pull request #4377 from zdenekmaxa/reqmgr-clone-prioritybugfix2

ReqMgr cloned requests priority fix