DNET-550 NotSupportedException occurs when using ServerType embedded

Found by unit-tests in our current project using fbembed.dll
Here is a simple project, that fully reproduces this issue. Issue depends on Code first and I don't see any test that uses EF in unit-tests. But in archive below persist all necessary information.
http://tracker.firebirdsql.org/secure/attachment/12480/FirebirdBugs.zip