Fix an error when attempting to delete the tmp dirs on Windows

btest

@@ -1063,7 +1063,12 @@ class Test(object):
 
             if not success:
                 self.mgr.testSkipped(self)
-                if not Options.tmps:
+                if not self.mgr_data["Options"].tmps:
+                    # Close these here, since the rm command in rmtmp will return an error on
+                    # windows if the files are still open.
+                    self.log.close()
+                    self.stdout.close()
+                    self.stderr.close()
                     self.rmTmp()
                 self.finish()
                 return
@@ -1207,6 +1212,11 @@ class Test(object):
                 self.mgr.testSucceeded(self)
 
             if not self.mgr_data['Options'].tmps and self.reruns == 0:
+                # Close these here, since the rm command in rmtmp will return an error on
+                # windows if the files are still open.
+                self.log.close()
+                self.stdout.close()
+                self.stderr.close()
                 self.rmTmp()
 
         self.finish()
@@ -1323,7 +1333,10 @@ class Test(object):
                 os.remove(self.tmpdir)
 
             if os.path.isdir(self.tmpdir):
-                subprocess.call("rm -rf %s 2>/dev/null" % self.tmpdir, shell=True)
+                if sys.platform == 'win32':
+                    subprocess.call(f"rm -rf {make_posix_path_from_windows(self.tmpdir)}", shell=True)
+                else:
+                    subprocess.call(f"rm -rf {self.tmpdir} 2>/dev/null", shell=True)
 
         except OSError as e:
             error("cannot remove tmp directory %s: %s" % (self.tmpdir, e))