Fix flaky acceptance test.
Fixed studio can't handle more than 9 lines in advanced settings.
STUD-1483
Remove unused function
Centralize when json parsing of responses from controller_query_service happens
Fix a decode error in course_about.html and make some string translatable

The strings in share links should be in unicode, otherwise when the name of a course is non-ascii, it will generate a decode error.
And some of these strings is actually translatable, so they should be collected into mako.po.
Collect metrics around the open_ended_grading controller_query_service
Correctly catch RubricParsingErrors
Make GradingServices always return dictionaries, rather than sometimes returning strings
Record metrics about the peer grading service
Record metrics about the staff grading service
Actually push json parsing all the way down to the bottom of the GradingService get and post methods
Merge pull request #3119 from louyihua/translation-fix

Fix a decode error in course_about.html and make some string translatable
Merge pull request #3091 from cpennington/ora-metrics

Add metrics around old ORA requests
Capture metrics for problem attempts and histograms of problem grades
Fix bad interaction between pluggable InputTypes and Microsites

Pluggable InputTypes use edxmako.paths.add_lookup to inject new
mako template directories. Those were getting clobbered by microsites
(and by theming), which were completely rebuilding the mako template
lookup list from scratch.

This commit switches those two features to use the same add_lookup
function as pluggable InputTypes.

[LMS-2489]
Make new-style chinese language codes works for translation

The old-style chinese language codes used in django 1.4 series are now deprecated, as discussed here:  https://code.djangoproject.com/ticket/18419.
Although majority of browsers still use the old-style language codes, some new browsers such as IE11 in Windows 8.1 start to use the new-style names instead of old-style ones which makes the current chinese translations of edX can't work properly under these browsers.
As there is no easy way for edX to change a higher version of django, I think we could do some mapping here so that the users who use IE11 in Windows 8.1 or other browsers that use the new-style names can view correct translations.
Also, this fix will make users who use one of the language codes:  zh-hk ,  zh-sg  and  zh-mo  can see the correct translations.
Display transcript translations for student in their source language.
Fix acceptance tests.
Wait for big subtitles to render.
Set big timeout for big subtitles.