Remove custodial site

Remove the custodialSite parameter last vestiges, it didn't
have a use case.

Fixes #4376
Fix JobPrio update in Condor

Priority value must be constrained to an integer
PhEDEx improvement

Refactor the code to use WMBS as the source of information
instead of opening specs, this allows better accounting and
flexibility.

Summary of functionality changes:

- Clean up the SQLite code in PhEDEx, it is outdated and not supported.
- Add the Tier-0 support through the safeMode option.
- Check for duplicate dataset subscriptions before subscribing, this included unapproved transfer requests.
- Requests are compacted by site and datasets (i.e. some requests will subscribe multiple datasets to multiple sites if possible).

Fixes #4479
Fixes #4480
Merge pull request #4616 from dballesteros7/fixjobpriocondor

Fix JobPrio update in Condor
Merge pull request #4617 from dballesteros7/PhEDExSubscriptorReloaded

PhEDEx subscriptor reloaded
0.9.69

Signed-off-by: Dirk Hufnagel <Dirk.Hufnagel@cern.ch>
ReqMgr2 auxiliary database

-auxiliary database reqmgr_auxiliary definition
-ReqMgrAux couchapp
-root package name change WMCore/ReqMgr -> WMCore/reqmgr
-cron job for software versions updating defined
-Group, Team, Software REST API including updates
-Request GET REST method
-couchdb database convenience wrapper
-ReqMgr2 test / interaction client test/data/reqmgr/reqmgr.py

Unittests will be included in test/python/WMCore_t/reqmgr_t
Merge pull request #4619 from zdenekmaxa/reqmgr2-reqmgr_auxiliary-database

ReqMgr2 auxiliary database
0.9.70

Signed-off-by: Zdenek Maxa <zdenek.maxa@cern.ch>