Miscellaneous updates

tb/test_base.sv

@@ -12,8 +12,12 @@ class test_base extends uvm_test;
 
     // ------------------------------------------------------------
     function void build_phase(uvm_phase phase);
+        uvm_root ur;
         super.build_phase(phase);
 
+        ur = uvm_root::get();
+        ur.set_timeout(10us);
+
         env = tb_env::type_id::create("env", this);
         tb_printer = new("tb_printer");