patch 8.2.1944: Netbeans test is flaky

Problem:    Netbeans test is flaky.
Solution:   Add a short delay. (Yegappan Lakshmanan, closes #7246)
diff --git a/src/testdir/test_netbeans.vim b/src/testdir/test_netbeans.vim
index c4851ae..629c31a 100644
--- a/src/testdir/test_netbeans.vim
+++ b/src/testdir/test_netbeans.vim
@@ -309,6 +309,7 @@
   call WaitFor('len(ReadXnetbeans()) >= (g:last + 3)')
   let l = ReadXnetbeans()
   call assert_equal('send: 2:setDot!57 3/6', l[-1])
+  sleep 10m
   call assert_equal([0, 3, 7, 0], getpos('.'))
   let g:last += 3
 
@@ -318,6 +319,7 @@
   call WaitFor('len(ReadXnetbeans()) >= (g:last + 3)')
   let l = ReadXnetbeans()
   call assert_equal('send: 2:setDot!57 9', l[-1])
+  sleep 10m
   call assert_equal([0, 2, 1, 0], getpos('.'))
   let g:last += 3