[lldbsuite] Make the names of test classes unique

[stella.stamenova]

Summary

If the names are not unique, the tests overwrite each other's results and logs. This also causes failures on platforms where the files are locked for writing.

The names of the class/test pairs *have to* always be unique. The easiest way to achieve that is to name each class differently (usually the same as the file name).

[clayborg]

It would be great if we can detect this when all of the test files are loaded and emit an error instead of waiting for results to be overwritten

packages/Python/lldbsuite/test/functionalities/gdb_remote_client/TestStopPCs.py

 from __future__ import print_function
 import lldb
 from lldbsuite.test.lldbtest import *
 from lldbsuite.test.decorators import *
 from gdbclientutils import *
 
 
-class TestThreadSelectionBug(GDBRemoteTestBase):
+class TestStopPCs(GDBRemoteTestBase):
     def test(self):
         class MyResponder(MockGDBServerResponder):
             def haltReason(self):
                 return "T02thread:1ff0d;threads:1ff0d,2ff0d;thread-pcs:10001bc00,10002bc00;"
 
             def threadStopInfo(self, threadnum):
                 if threadnum == 0x1ff0d:
                     return "T02thread:1ff0d;threads:1ff0d,2ff0d;thread-pcs:10001bc00,10002bc00;"