Allow multiple DQMConfigCacheIDs in TaskChain

Assume that Task3 and Task2 have DQM output,
then the usage is :

{ "DQMConfigCacheID" : .....,

   "Task2" : {"DQMConfigCacheID" : ....}
}

With this configuration Task3 will use the original DQMConfigCacheID
in the main dictionary but Task2 will use the the DQMConfigCacheID
defined in its own internal configuration.

Fixes #4614
Allow overrides on the Primary dataset

Only for MonteCarloFromGEN workflows, when
PrimaryDataset is specified the output will use this instead
of the input primary dataset.

Fixes #4615
Add support in Reqmgr for deterministic pileup

It just adds a new parameter to the splitting
algorithms in ReDigi. The actual support will come
in a WMAgent patch that is still under testing.
Replacing old SiteDB v1 API with v2.

Replacing #4661
Uses Services/SiteDB interface
SiteDB URL completely removed from the configuration.

Fixes #4625
Merge pull request #4664 from zdenekmaxa/reqmgr-sitedbv2api-4625-2

Replacing old SiteDB v1 API with v2.
Merge pull request #4662 from dballesteros7/deterministic-pileup

Add support in Reqmgr for deterministic pileup
Merge pull request #4652 from dballesteros7/override-input-primds

Allow overrides on the Primary dataset
Merge pull request #4651 from dballesteros7/multiple-dqm-harvesting-configs

Allow multiple DQMConfigCacheIDs in TaskChain
0.9.73

Signed-off-by: Zdenek Maxa <zdenek.maxa@cern.ch>
ReqMgr SiteDB v2, forgotten dependency fix
Merge pull request #4666 from zdenekmaxa/reqmgr-sitedbv2api-4625-3

ReqMgr SiteDB v2, forgotten dependency fix
0.9.74

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