REGTEST: adapt some reg tests after renaming.

Some reg tests and their dependencies have been renamed. They may be
referenced by the .vtc files. So, this patch modifies also the references
to these dependencies.
diff --git a/reg-tests/lua/txn_get_priv.vtc b/reg-tests/lua/txn_get_priv.vtc
index ecb9955..98f98f7 100644
--- a/reg-tests/lua/txn_get_priv.vtc
+++ b/reg-tests/lua/txn_get_priv.vtc
@@ -6,8 +6,8 @@
 
 haproxy h1 -conf {
     global
-        lua-load ${testdir}/b00002.lua
-        lua-load ${testdir}/b00002_print_r.lua
+        lua-load ${testdir}/txn_get_priv.lua
+        lua-load ${testdir}/txn_get_priv-print_r.lua
 
     frontend fe1
         mode http