General btest cleanup

- Use `-b` most everywhere, it will save time.

- Start some intel tests upon the input file being fully read instead of
  at an arbitrary time.

- Improve termination condition for some sumstats/cluster tests.

- Filter uninteresting output from some supervisor tests.

- Test for `notice_policy.log` is no longer needed.

testing/btest/scripts/base/protocols/modbus/register_parsing.zeek

@@ -1,4 +1,4 @@
-# @TEST-EXEC: zeek -r $TRACES/modbus/fuzz-1011.trace %INPUT >output
+# @TEST-EXEC: zeek -b -r $TRACES/modbus/fuzz-1011.trace %INPUT >output
 # @TEST-EXEC: btest-diff modbus.log
 # @TEST-EXEC: btest-diff output
 
@@ -10,6 +10,8 @@
 # case TCP_ApplicationAnalyzer::ProtocolViolation asserts its behavior for
 # incomplete connections).
 
+@load base/protocols/modbus
+
 event modbus_read_input_registers_request(c: connection, headers: ModbusHeaders, start_address: count, quantity: count)
 	{
 	print "modbus_read_input_registers_request", c$id, headers, start_address, quantity;