Fixed #43 : BnfNodeParser: I can recognize when multiple level of ISA

Fixed #44 : BnfNodeParser: I must simplify results when multiple levels of ISA
Fixed #45 : Dynamic variables cannot be parsed at restart
Fixed #46 : Concepts variables values are transformed into list by default
Fixed #47 : SheerkaAdmin. Add min, max, mean time when restoring files

tests/non_reg/test_sheerka_non_reg.py

@@ -7,8 +7,6 @@ from core.sheerka.services.SheerkaConceptManager import SheerkaConceptManager
 from evaluators.MutipleSameSuccessEvaluator import MultipleSameSuccessEvaluator
 from evaluators.OneSuccessEvaluator import OneSuccessEvaluator
 from evaluators.PythonEvaluator import PythonEvalError
-from parsers.BnfNodeParser import Sequence, StrMatch, OrderedChoice, Optional, ConceptExpression
-from tests.TestUsingFileBasedSheerka import TestUsingFileBasedSheerka
 from tests.TestUsingMemoryBasedSheerka import TestUsingMemoryBasedSheerka
 from tests.parsers.parsers_utils import CMV, CC, compare_with_test_object, CB
 
@@ -1299,7 +1297,7 @@ as:
 
         assert sheerka.objvalue(res[0].body.get_value("qty")) == 2
 
-    def test_i_can_implement_implement_the_concept_and(self):
+    def test_i_can_implement_the_concept_and(self):
         init = [
             "def concept x and y as x and y",
             "set_is_lesser(__PRECEDENCE, c:x and y:, 'Sya')",
@@ -1310,4 +1308,3 @@ as:
 
         assert len(res) == 1
         assert res[0].status
-