extend max_length of anonymous_user_id (LMS-1571)
Handle integrity errors when creating/retrieving AnonymousUserId entries
add temporary error message for ORA panel
Merge pull request #1841 from edx/hotfix/error-msg-ORA-panel

Hotfix/error msg ora panel
adds more temporary error messages
Merge pull request #1842 from edx/hotfix/error-msg-ORA-panel

adds more temporary error messages
Merge pull request #1840 from edx/adam/db-error

Fixes to database columns
Fix LTI max_score method.
Make has_score to be XField insted of decriptor property.

Conflicts:
	common/lib/xmodule/xmodule/lti_module.py
Fix LTI tests.
Add a backwards migration to delete the archive table
Add managemant command to generate sql to clean up tp truncated student ids in ORA db
Add message explaining partial recovery
Merge pull request #1852 from cpennington/more-db-error-fixes

Add recovery command
Merge pull request #1851 from edx/ned/merge-lti-hotfix

Ned/merge lti hotfix
modify partial recovery message
Merge pull request #1854 from cpennington/wording-fixes

modify partial recovery message
removes temporary error messages
Merge pull request #1860 from edx/hotfix/no-error-messages

removes temporary error messages
add all clear message