fix Issue 7892 - Compiler-generated struct copies can result in errors when ctor is @disable'd
Rename "unittest" to "ddocUnittest" since it should only be used with ddoc.
Fixes Issue 10992 - Missing unittests when using getUnittests trait.
Merge pull request #2544 from AndrejMitrovic/Fix10992

Issue 10992 - Missing unittests when using getUnittests trait
Merge pull request #2596 from 9rnsr/fix7892

Issue 7892 - Compiler-generated struct copies can result in errors when ctor is @disable'd