Draft: Add test to check passthrough sequence

Adds a test to check if running Allen with MooreOnline with the passthrough sequence runs without failing.

AllenOnline/tests/qmtest/test_passthrough.qmt

+<?xml version="1.0" ?><!DOCTYPE extension  PUBLIC '-//QM/2.3/Extension//EN'  'http://www.codesourcery.com/qm/dtds/2.3/-//qm/2.3/extension//en.dtd'>
+<!--
+    (c) Copyright 2020 CERN for the benefit of the LHCb Collaboration
+-->
+<!--
+#######################################################
+# SUMMARY OF THIS TEST
+# ...................
+# Author: Kate Richardson 
+# Purpose: Test running Allen through MooreOnline with
+# the passthrough sequence
+#######################################################
+-->
+<extension class="GaudiTest.GaudiExeTest" kind="test">
+  <argument name="program"><text>python</text></argument>
+  <argument name="args"><set>
+    <text>${BINARYDUMPERSROOT}/options/allen.py</text>
+    <text>-n</text><text>1000</text>
+    <text>--sequence</text><text>${ALLEN_INSTALL_DIR}/constants/passthrough.json</text>
+    <text>--tags</text><text>upgrade/dddb-20220111,upgrade/jmarchan-newCaloDecoding</text>
+    <text>--mep</text><text>/group/hlt/data_hlt1/2022-06-05/LHCb_BU_40.mep</text>
+  </set></argument>
+  <argument name="use_temp_dir"><enumeral>true</enumeral></argument>
+  <argument name="timeout"><integer>3000</integer></argument>
+  <argument name="validator"><text>
+
+from AllenOnline.qmtest.exclusions import preprocessor
+validateWithReference(preproc=preprocessor)
+
+countErrorLines({"FATAL" : 0, "ERROR" : 0, "WARNING" : 0})
+
+  </text></argument>
+</extension>