domain 8.x-1.0-alpha12

This is a bugfix release. Clearing cache is required.

Bugs fixed

• Issue #2944171: Notice: Undefined variable: httpHost in isRegisteredDomain by bibishani: Notice: Undefined variable: httpHost in isRegisteredDomain()
• Issue #2941393: Wrong path for an annotation on DomainTokenBlock.php by yo30: Wrong path for an annotation on DomainTokenBlock.php
• Better handling of Domain Source schema
• Updates travis testing criteria.
• Adds additional information to the Domain Server block.
• Issue #2936697: Fatal error: Call to a member function getDomainId() on a non-object by abramm: Fatal error: Call to a member function getDomainId() on a non-object
• Improve the domain source element test.
• Issue #2931544: Source domain must be selected on edit by agentrickard, Mistrae, Stephen Rockwell: Source domain must be selected on edit
• Fixes path error in domain content controller.
• Fixes for Views schemas.
• Adds domain content views schema.
• Resolve theme function needs.
• Change entity_get_form_display() usage.