GitLab

* First draft of abstract node factory and it's implementation for ml pipeline.

* Creation of nodes while mutation done using node factory. _add_separate_parent_node need fixing)

* Factory methods modified, tests for PipelineOptNodeFactory added

* OptNodeFactory is placed in GraphGenerationParams.

* advisor and requirements are now class attributes, default implementation of OptNodeFabric, methods of factory refactored.

* Test for DefaultOptNodeFactory

* Creation of nodes while mutation done using node factory. _add_separate_parent_node need fixing)

* OptNodeFactory is placed in GraphGenerationParams.

* advisor and requirements are now class attributes, default implementation of OptNodeFabric, methods of factory refactored.

* Test for DefaultOptNodeFactory

* Method to compose generation params for pipeline.

* docStrings and typeHints for mutation operators added, change_node method renamed to exchanged_node, advisor is added as an attribute of GraphGenerationParams class.

* Import of Sequence fixed

* Typing of requirements in PipelineOptNodeFactory changed to PipelineComposerRequirements

* Logging fixed

* ABC import fixed