adding patch for top validation crash and safties for tau val in 4_1_X
backport of --filein dbs: --filein das: and migration from DBS to DAS. matrix is not migrated
change from local das client to global das client.
Merge pull request #2113 from vlimant/DBS2DAS-ConfigBuilder-4.1

Dbs2 das config builder 4.1
Merge pull request #2069 from inugent/TopValPatch_4_1_X

adding patch for top validation crash and safties for tau val in 4_1_X