Unable to edit Wiki page with MediaWiki format after upgrade

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.1 CE GA2
• Fix Version/s: 7.0.0 DXP FP9, 7.0.0 DXP SP2, 7.0.3 CE GA4, Master
• Component/s: Wiki, ~ [Archived] Collaboration
• Labels:
  • LR7UPGRADE
  • collab-upgrades
  • liferay-digital-enterprise-70-sp2
  • liferay-fixpack-de-9-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Sprint: Sphaerosiderite 12/6-12/20, Tetraferriphlogopite 12/20-1/3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/40847

Steps to reproduce

1. Start 6.x
2. Add Wiki Page with MediaWiki format
3. Shut down portal
4. Execute upgrade to 7.0
5. Start 7.0
6. Add Wiki portlet
7. Go to Wiki Page with MediaWiki format
8. Assert "The format of this page is not supported. The page content will be shown unformatted" displays
9. Edit Wiki page

I also attached the mySQL dump file I used for this upgrade.

Expected result: Wiki page can be edited
Actual result: Wiki portlet displays "Wiki is temporarily unavailable"
Clicking on Content and History tab in Details also results to Wiki portlet being unavailable

Reproduced on:
Tomcat 8.0.32 + MySQL 5.6
Liferay Portal master GIT ID: 949ba040ae159219c998308c8fc772074b9d11a3
Liferay Portal GA2