Fix some issues that were prevent lms start

common/lib/xmodule/xmodule/combined_open_ended_module.py

-import copy
-from fs.errors import ResourceNotFoundError
-import itertools
 import json
 import logging
 from lxml import etree
-from lxml.html import rewrite_links
-from path import path
-import os
-import sys
 
 from pkg_resources import resource_string
 
-from .capa_module import only_one, ComplexEncoder
 from .editing_module import EditingDescriptor
-from .html_checker import check_html
-from progress import Progress
-from .stringify import stringify_children
 from .x_module import XModule
 from .xml_module import XmlDescriptor
-from xmodule.modulestore import Location
 from combined_open_ended_modulev1 import CombinedOpenEndedV1Module, CombinedOpenEndedV1Descriptor
 
 log = logging.getLogger("mitx.courseware")

common/lib/xmodule/xmodule/combined_open_ended_modulev1.py

-import copy
-from fs.errors import ResourceNotFoundError
-import itertools
 import json
 import logging
 from lxml import etree
 from lxml.html import rewrite_links
-from path import path
-import os
-import sys
 
 from pkg_resources import resource_string
 
-from .capa_module import only_one, ComplexEncoder
+from .capa_module import ComplexEncoder
 from .editing_module import EditingDescriptor
-from .html_checker import check_html
 from progress import Progress
 from .stringify import stringify_children
-from .x_module import XModule
 from .xml_module import XmlDescriptor
-from xmodule.modulestore import Location
 import self_assessment_module
 import open_ended_module
-from combined_open_ended_rubric import CombinedOpenEndedRubric, RubricParsingError
-from .stringify import stringify_children
+from combined_open_ended_rubric import CombinedOpenEndedRubric
 import dateutil
 import dateutil.parser
-import datetime
 from timeparse import parse_timedelta
 
 log = logging.getLogger("mitx.courseware")

common/lib/xmodule/xmodule/openendedchild.py

-import copy
-from fs.errors import ResourceNotFoundError
-import itertools
 import json
 import logging
-from lxml import etree
-from lxml.html import rewrite_links
 from lxml.html.clean import Cleaner, autolink_html
-from path import path
-import os
-import sys
-import hashlib
-import capa.xqueue_interface as xqueue_interface
 import re
 
-from pkg_resources import resource_string
-
-from .capa_module import only_one, ComplexEncoder
-from .editing_module import EditingDescriptor
-from .html_checker import check_html
 from progress import Progress
-from .stringify import stringify_children
-from .xml_module import XmlDescriptor
-from xmodule.modulestore import Location
 from capa.util import *
 import open_ended_image_submission
 
@@ -74,7 +56,7 @@ class OpenEndedChild(object):
         'done': 'Problem complete',
     }
 
-    def __init__(self, system, location, definition, descriptor, static_data, 
+    def __init__(self, system, location, definition, descriptor, static_data,
                  instance_state=None, shared_state=None, **kwargs):
         # Load instance state
         if instance_state is not None:

common/lib/xmodule/xmodule/peer_grading_module.py

@@ -24,7 +24,7 @@ from lxml.html import rewrite_links
 import os
 
 from pkg_resources import resource_string
-from .capa_module import only_one, ComplexEncoder
+from .capa_module import ComplexEncoder
 from .editing_module import EditingDescriptor
 from .html_checker import check_html
 from progress import Progress

lms/xmodule_namespace.py

-from xblock.core import Namespace, Boolean, Scope, String, List
+from xblock.core import Namespace, Boolean, Scope, String, List, Float
 from xmodule.fields import Date, Timedelta