Fix BasicP2RepositoryIntegrationTest with 2023-03

Bundle id changes.
Simplified setup a bit while at it to be more like rest of the test
suite.

tycho-its/projects/p2Repository/category.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!-- includes three bundles in different ways; note: the bundles do not require each other -->
 <site>
-   <bundle id="com.sun.el" version="0.0.0"/>
+   <bundle id="com.sun.el.javax.el" version="0.0.0"/>
    <iu id="org.apache.felix.gogo.runtime" version="0.0.0">
      <category name="Test Category" />
    </iu>

tycho-its/projects/p2Repository/pom.xml

@@ -43,7 +43,7 @@
 		<repository>
 			<id>test-data-repo</id>
 			<layout>p2</layout>
-			<url>${test-data-repo}</url>
+			<url>${target-platform}</url>
 		</repository>
 	</repositories>
 

tycho-its/src/test/java/org/eclipse/tycho/test/p2Repository/BasicP2RepositoryIntegrationTest.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2012, 2021 SAP AG and others.
+ * Copyright (c) 2012, 2023 SAP AG and others.
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at