Change resource_link_id on import (BLD-768).

LTI: Update resource_link_id to change on import to another system or context (BLD-768).
Merge pull request #3040 from edx/oleg/fix-resource-link-id

LTI resource_link_id. BLD-768.
Add context_id.
Allow import of native XBlocks in draft
Added tests for importing a pure XBlock
Merge pull request #3052 from edx/oleg/add-context-id

LTI context_id. BLD-584.
Remove double quoting.
Disable flaky test.
Merge pull request #3245 from edx/oleg/fix-doublequoting

Fix doublequoting. BLD-812.
Merge pull request #3247 from edx/anton/disable-flaky-video-test

Disable flaky acceptance test.
Updating ORA2 requirements for patch fix
Merge pull request #3242 from edx/will/studio-import-private-fix

Allow import of native XBlocks in draft
Merge pull request #3248 from edx/sanchez/ora2-2014-04-08

Updating ORA2 requirements for patch fix
HD control is hidden initially. On first play of video, when
player.getAvailableQualityLevels returns a non-empty array, it will eventually display, if HD qualities are available (highres, hd1080, hd720). [BLD-937]