Upstream ProblemBlock exceptions and shared utilities to XBlock

[irtazaakram]

• Resolves Upstream ProblemBlock exceptions and shared utilities to XBlock public-engineering#468

Testing:

Problem Type	Correct / Incorrect	Partial Credit	Logic / Random	UI (Reset / Show Ans)	Advanced (XML / Ext)
Single Select (MCQ)	✅	–	✅	✅	✅
Multi-select (Checkbox)	✅	✅	–	✅	✅
Dropdown	✅	–	✅	✅	✅
Numerical Input	✅	✅	–	✅	✅
Text Input	✅	–	✅	✅	✅
Circuit Schematic (Locally Tested)	✅	–	–	✅	✅
Custom JS (JSInput) (Locally Tested)	✅	✅	✅	✅	✅
Custom Python-evaluated (Locally Tested)	✅	✅	✅	✅	✅
Image Mapped Input	✅	–	–	✅	✅
Math Expression Input	✅	–	✅	✅	✅
Problem w/ Adaptive Hint (Locally Tested)	✅	✅	–	✅	✅
Drag and Drop	✅	–	–	✅	–
Multipart Problems	✅	✅	✅	✅	✅
External Grader (XQueue) (Locally Tested)	✅	-	–	✅	✅
Python Lib (zip) (Locally Tested)	✅	–	-	✅	✅
Chemical Equation (Locally Tested)	✅	–	–	✅	✅
Gene Explorer (Locally Tested)	tool works no idea whats the solution here	–	–	✅	✅
Protein Builder (Locally Tested)	tool works no idea whats the solution here	–	–	✅	✅
Annotation	✅	–	–	✅	✅
File Submission (Locally Tested)	✅	–	–	-	✅
Code Input	–	–	–	–	–
MATLAB Problem	-	–	–	-	-
VSEPR (Molecular Geometry) (Dead???)	–	–	–	–	–
Crystallography (Dead???)	–	–	–	–	–
Molecule Editor (editamolecule) (Dead???)	–	–	–	–	–

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Library Test:

• Problem created in V2 Content Library, edited, published
• Library problem used in a course
• Library problem overridden in course

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[farhan]

LGTM but 1 query

NotFoundError name will be duplicated in xmodule and xblock
Can we rename 1 of them for the clarity of import?