[+] functional tests migrate from file-based to solution-based test data
      - test/data/daemon/Tested/Tested.sln solution is introduced
      - it has class library assembly and unit-tests library (in MockMetrics solution they are presented in "fortests" solution folder)
      - Foo class, SimpleTests class and SimpleTests.cs.gold migrates to Tested.sln
      - now functional tests launches against this solution instead of fake <Test>.sln with <TestProject> that sdk creates dynamically
      - this will allow eaters to distinguish target calls (calls of classes from assemblies in solution) from other calls(calls oа classes from referenced assemblies)
[*] functional tests are separated, asserts are commented
[+] ExpressionKind.Result are added
[+] SimpleVariableTests and ExpressionVariableTests are satisfied
      - UnitTestEater saves into snapshot names of tested project
      - then InvocationEater checks invoked method for beloging to one of tested project by module name
      - if method belongs tested project, then it is TargetCall
      - variable initialized by return value of this method is Result