Merge pull request #6851 from edx/ned/fix-gettext-literals

cms/djangoapps/contentstore/git_export_utils.py

...djangoapps/contentstore/management/commands/git_export.py

cms/djangoapps/contentstore/views/library.py

cms/djangoapps/models/settings/course_metadata.py

common/lib/xmodule/xmodule/lti_module.py

common/lib/xmodule/xmodule/seq_module.py

lms/djangoapps/dashboard/sysadmin.py

lms/djangoapps/instructor/views/api.py

lms/djangoapps/shoppingcart/models.py

lms/djangoapps/shoppingcart/pdf.py

lms/djangoapps/shoppingcart/processors/CyberSource.py

lms/djangoapps/shoppingcart/processors/CyberSource2.py

lms/djangoapps/shoppingcart/views.py