GitLab

* add sigopt hpo to transformers.
Signed-off-by: Ding, Ke <ke.ding@intel.com>

* extend sigopt changes to test code and others..
Signed-off-by: Ding, Ke <ke.ding@intel.com>

* Style.

* fix style for sigopt integration.
Signed-off-by: Ding, Ke <ke.ding@intel.com>

* Add necessary information to run unittests on SigOpt.
Co-authored-by: Morgan Funtowicz <funtowiczmo@gmail.com>