Fix a bunch of files with pylint disabled (#8743)

* Re-enable pylint for superset/jinja_context.py

* Re-enable pylint for superset/sql_lab.py

* Re-enable pylint for superset/sql_parse.py

* Re-enable pylint for superset/exceptions.py

* Re-enable lint for superset/translations/utils.py

* Re-enable pylint for superset/views/schedules.py

* Re-enable pylint for superset/views/base.py

* Re-enable pylint for superset/views/log/views.py

* Re-enable pylint for superset/views/annotations.py

* black

* PR feedback, pylint, isort fixes

* Black, one more time...

* Move ungrouped-imports to a global disable

superset/views/annotations.py

@@ -14,7 +14,6 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
-# pylint: disable=C,R,W
 from flask_appbuilder.models.sqla.interface import SQLAInterface
 from flask_babel import gettext as __, lazy_gettext as _
 from wtforms.validators import StopValidation
@@ -25,7 +24,7 @@ from superset.models.annotations import Annotation, AnnotationLayer
 from .base import DeleteMixin, SupersetModelView
 
 
-class StartEndDttmValidator(object):
+class StartEndDttmValidator(object):  # pylint: disable=too-few-public-methods
     """
     Validates dttm fields.
     """
@@ -43,7 +42,9 @@ class StartEndDttmValidator(object):
             )
 
 
-class AnnotationModelView(SupersetModelView, DeleteMixin):
+class AnnotationModelView(
+    SupersetModelView, DeleteMixin
+):  # pylint: disable=too-many-ancestors
     datamodel = SQLAInterface(Annotation)
 
     list_title = _("List Annotation")
@@ -79,17 +80,19 @@ class AnnotationModelView(SupersetModelView, DeleteMixin):
 
     validators_columns = {"start_dttm": [StartEndDttmValidator()]}
 
-    def pre_add(self, obj):
-        if not obj.start_dttm:
-            obj.start_dttm = obj.end_dttm
-        elif not obj.end_dttm:
-            obj.end_dttm = obj.start_dttm
+    def pre_add(self, item):
+        if not item.start_dttm:
+            item.start_dttm = item.end_dttm
+        elif not item.end_dttm:
+            item.end_dttm = item.start_dttm
 
-    def pre_update(self, obj):
-        self.pre_add(obj)
+    def pre_update(self, item):
+        self.pre_add(item)
 
 
-class AnnotationLayerModelView(SupersetModelView, DeleteMixin):
+class AnnotationLayerModelView(
+    SupersetModelView, DeleteMixin
+):  # pylint: disable=too-many-ancestors
     datamodel = SQLAInterface(AnnotationLayer)
 
     list_title = _("List Annotation Layer")