Tidy up - Rename Base

Some Python class and packages need to be renamed
for a better compliance with the shared terminology
which provides a better understanding of Watcher
objects and components by every contributor.

This patchset add missing Base in class name

Partially implements: blueprint glossary-related-refactoring

Change-Id: I95a3e41fbd5fcd90a99d81c9cf278940f50c7732

watcher/decision_engine/solution/solution_evaluator.py

@@ -21,7 +21,7 @@ import six
 
 
 @six.add_metaclass(abc.ABCMeta)
-class SolutionEvaluator(object):
+class BaseSolutionEvaluator(object):
     @abc.abstractmethod
     def evaluate(self, solution):
         raise NotImplementedError(