[py2py3] Migration at level scr/python/A/B/C - slice 3

[mapellidario]

Intro

Our purpose is to continue with the gradual migration.
This is the 3rd slice in which the migration has been divided into.
We have split migration units at level src/python/A/B/C.

A detailed plan of the migration at this depth is available
at the dmwm mkdocs detailed plan page,
with summary information on top.

Impact of the new feature

We start migrating the 3rd bulk of migration units
at src/python/A/B/C level.

                                                           name  nfiles  gradual  future_pm
                     WMQuality_Emulators_AnalyticsDataCollector       1     True          8
                                             WMCore_REST_Format       1     True         13
                                              WMCore_REST_Tools       1     True          0
                                          WMCore_Services_MonIT       1     True          2
                                            WMCore_Services_McM       1     True          2
                                  WMCore_WebTools_Documentation       1     True          0
                                       WMCore_WebTools_Masthead       1     True          0
                                  WMCore_WebTools_RESTFormatter       1     True          5
                            WMCore_WebTools_SecureDocumentation       1     True          2
                                        WMCore_WebTools_Welcome       1     True          0
                               WMQuality_WebTools_RESTClientAPI       1     True          2
                                               WMCore_REST_Main       1     True          6
 WMComponent_AnalyticsDataCollector_DataCollectorEmulatorSwitch       1     True          3
                          WMComponent_DBS3Buffer_DBSBufferBlock       1     True         11
                          WMComponent_JobSubmitter_JobSubmitAPI       1     True          0
                        WMComponent_JobStatusLite_DefaultConfig       1     True          0
                     WMComponent_WorkQueueManager_DefaultConfig       1     True          0
                                              WMCore_Agent_Flow       2     True         30

Is your feature request related to a problem? Please describe.

The end goal is to have WMCore py2 and py3 compatible.

Describe the solution you'd like

Run futurize on the first bulk of units
and then apply the necessary manual changes.