patch 8.2.0533: tests using term_wait() can still be flaky

Problem:    Tests using term_wait() can still be flaky.
Solution:   Increase the wait time when rerunning a test. (James McCoy,
            closes #5899)  Halve the initial times to make tests run faster
            when there is no rerun.
diff --git a/src/testdir/test_suspend.vim b/src/testdir/test_suspend.vim
index 4b3bd5e..39ae32d 100644
--- a/src/testdir/test_suspend.vim
+++ b/src/testdir/test_suspend.vim
@@ -53,7 +53,7 @@
 
   " Quit gracefully to dump coverage information.
   call term_sendkeys(buf, ":qall!\<CR>")
-  call term_wait(buf)
+  call TermWait(buf)
   " Wait until Vim actually exited and shell shows a prompt
   call WaitForAssert({-> assert_match('[$#] $', term_getline(buf, '.'))})
   call StopShellInTerminal(buf)