OrleansCodeGenerator.dll not found during test runs.
OrleansCodeGenerator.dll not found during test runs.

- Add missing `[DeploymentItem]` to ensure the `OrleansCodeGenerator.dll` assembly is shadow copied into the tests runtime directory.

Failure Mode:

```
[2015-11-08 05:55:09.462 GMT    19 WARNING 101722 CodeGenerator ] Could not load file or assembly 'OrleansCodeGenerator' or one of its dependencies.
The system cannot find the file specified.

Exc level 0: System.IO.FileNotFoundException: Could not load file or assembly 'OrleansCodeGenerator' or one of its dependencies.
The system cannot find the file specified.
   at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.Assembly.Load(AssemblyName assemblyRef)
   at Orleans.Runtime.AssemblyLoader.TryLoadAndCreateInstance[T](String assemblyName, TraceLogger logger)
      in c:\Depot\GitHub\orleans\src\Orleans\AssemblyLoader\AssemblyLoader.cs:line 109

[2015-11-08 05:55:09.463 GMT    19 WARNING 103806 CodeGenerator ] Code generator assembly (OrleansCodeGenerator.dll) not present.
```

shayhatsor/orleans,brhinescot/orleans,Joshua-Ferguson/orleans,ibondy/orleans,veikkoeeva/orleans,ibondy/orleans,centur/orleans,hoopsomuah/orleans,dotnet/orleans,amccool/orleans,jkonecki/orleans,Liversage/orleans,dotnet/orleans,jokin/orleans,xclayl/orleans,sebastianburckhardt/orleans,Liversage/orleans,shlomiw/orleans,yevhen/orleans,SoftWar1923/orleans,tsibelman/orleans,rrector/orleans,galvesribeiro/orleans,sebastianburckhardt/orleans,gigya/orleans,waynemunro/orleans,dVakulen/orleans,Liversage/orleans,LoveElectronics/orleans,amccool/orleans,jokin/orleans,benjaminpetit/orleans,brhinescot/orleans,xclayl/orleans,gabikliot/orleans,bstauff/orleans,ashkan-saeedi-mazdeh/orleans,gigya/orleans,pherbel/orleans,jokin/orleans,shayhatsor/orleans,sergeybykov/orleans,ashkan-saeedi-mazdeh/orleans,jdom/orleans,rrector/orleans,ElanHasson/orleans,sergeybykov/orleans,Carlm-MS/orleans,jkonecki/orleans,Joshua-Ferguson/orleans,galvesribeiro/orleans,ticup/orleans,amccool/orleans,jthelin/orleans,LoveElectronics/orleans,tsibelman/orleans,ticup/orleans,ashkan-saeedi-mazdeh/orleans,SoftWar1923/orleans,waynemunro/orleans,ElanHasson/orleans,kylemc/orleans,centur/orleans,kylemc/orleans,jason-bragg/orleans,dVakulen/orleans,ReubenBond/orleans,yevhen/orleans,shlomiw/orleans,MikeHardman/orleans,jdom/orleans,brhinescot/orleans,bstauff/orleans,pherbel/orleans,Carlm-MS/orleans,MikeHardman/orleans,gabikliot/orleans,hoopsomuah/orleans,dVakulen/orleans