Distribute easytest execution to multiple windows user sessions

Distribute easytest execution to multiple windows user sessions
Change SequenceGenerator TypeName to unique index instead or PK

http://www.expandframework.com/forum/6-bugs/4176-fileattachmenttester-fails-with-nullreferenceexception/7515.html
Share XpandNavigationItemAttribute with all modules by moving it to base assembly
[WorldCreator easytests for MergeWithExistingType]
[WorldCreator easytests for OneToMany]
share CollectionsEditModeController with all modules
minor update
shared NuGet Package Restore