Add logging for user actions and umapi progress

[vossen-adobe]

Addresses #597
DEPENDS ON adobe-apiplatform/umapi-client.py#75

Adds the config option:

  # (optional) log_progress (default value True)
  # Includes an indication of progress for user actions on the umapi
  # Useful for tracking sync progress for pulling down, creating,
  # or updating large numbers of users
  # eg: 71/100 (71.0%) Creating user with user key: federatedID,user71@example.com,
  log_progress: True

Which is true by default. When enabled, progress from both pulling down UMAPI users as well as user actions is logged in terms of percentage of count. This is an action progress, NOT a temporal estimate.

This is implemented not as another parameter being passed throughout the code, but as an extra logger function. The decision of whether to insert a progress measurement is made based on a pseudo log level called 'progress'. This enables uniform control over output whereever in the sync tool progress is included. This has the advantage of being easily portable across the code since one must simply call self.logger.progress to use it.

[adorton-adobe]

We need to add a method to QueryMultiple in the umapi-client so we don't have to access private members of those objects here.