Fixed incorrect python that was trying to validate that we got a valid lldb.SBThread object by checking to see if it is equal to "None". 

This test is incorrect as functions that return lldb.SBThread objects never return None, they just return lldb.SBThread objects that contain invalid opaque classes. 



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@177416 91177308-0d34-0410-b5e6-96231b3b80d8