[Owls] Extensions utilizing Page Builder as their content creation tool will break with upgrade

[omiroshnichenko]

Scope

Bug

• PB-422 Extensions utilizing Page Builder as their content creation tool will break with upgrade

Checklist

• PR is green on M2 Quality Portal
• Jira issues have accurate summary, meaningful description and have links to relevant documentation at the story/task level
• Semantic Version build failure is approved by architect (if build is red)
• Pull Request approved by architect
• Pull Request quality review performed by
• All unstable functional acceptance tests are isolated (if any)
• All linked Zephyr tests are approved by PO and have Ready to Use status
• Travis CI build is green (for mainline CE only)
• Jenkins Extended FAT build is green

[omiroshnichenko]

@magento run all tests against 2.3-develop