Merge pull request #7552 from edx/hotfix/2015-04-01

common/djangoapps/student/tests/test_certificates.py

...modulestore/tests/test_cross_modulestore_import_export.py

common/lib/xmodule/xmodule/modulestore/xml_exporter.py

common/test/data/split_course_with_static_tabs/course.xml

...test/data/split_course_with_static_tabs/course/course.xml

...t/data/split_course_with_static_tabs/policies/assets.json

...urse_with_static_tabs/policies/course/grading_policy.json

...split_course_with_static_tabs/policies/course/policy.json

...st/data/split_course_with_static_tabs/tabs/test_page.html

.../courseware/management/commands/tests/test_dump_course.py

...mplates/dashboard/_dashboard_certificate_information.html