N°6274 Fix PHP Notices not caught in ItopDataTestCase PHPUnit

This was caused by the set_error_handler() done in DeprecatedCallsLog during startup

Now we are :
* not registering the handler if a PHPUnit test is running (based on a constant set in ItopTestCase::setUp)
* on registration only do it for the required notices

tests/php-unit-tests/unitary-tests/core/Log/DeprecatedCallsLogTest.php

@@ -0,0 +1,41 @@
+<?php
+/*
+ * @copyright   Copyright (C) 2010-2023 Combodo SARL
+ * @license     http://opensource.org/licenses/AGPL-3.0
+ */
+
+namespace Combodo\iTop\Test\UnitTest\Core\Log;
+
+
+use Combodo\iTop\Test\UnitTest\ItopTestCase;
+use DeprecatedCallsLog;
+
+class DeprecatedCallsLogTest extends ItopTestCase {
+	public function testPhpNoticeWithoutDeprecatedCallsLog(): void {
+		$this->expectNotice();
+
+		$aArray = [];
+		if ('toto' === $aArray['tutu']) {
+			//Do nothing, just raising a undefined offset warning
+		}
+	}
+
+	/**
+	 * The error handler set by DeprecatedCallsLog during startup was causing PHPUnit to miss PHP notices like "undefined offset"
+	 *
+	 * The error handler is now disabled when running PHPUnit
+	 *
+	 * @since 3.0.4 N°6274
+	 * @covers DeprecatedCallsLog::DeprecatedNoticesErrorHandler
+	 */
+	public function testPhpNoticeWithDeprecatedCallsLog(): void {
+		$this->RequireOnceItopFile('core/log.class.inc.php');
+		DeprecatedCallsLog::Enable(); // will set error handler
+		$this->expectNotice();
+
+		$aArray = [];
+		if ('toto' === $aArray['tutu']) {
+			//Do nothing, just raising a undefined offset warning
+		}
+	}
+}