Fix master ITs (#11371)

Fixes to master re ITs:
* missing `.mvn` folder and parent from local repo
* rename dangling IT that seems never to run

Author: cstamas

its/core-it-suite/src/test/java/org/apache/maven/it/MavenITMissingNamespaceTest renamed to its/core-it-suite/src/test/java/org/apache/maven/it/MavenITMissingNamespaceTest.java

@@ -32,9 +32,6 @@ public MavenITMissingNamespaceTest() {
      */
     @Test
     public void testMissingNamespace() throws Exception {
-
-        boolean supportSpaceInXml = matchesVersionRange("[3.1.0,)");
-
         File testDir = extractResources("/missing-namespace");
         Verifier verifier = newVerifier(testDir.getAbsolutePath());
         verifier.setAutoclean(false);

its/core-it-suite/src/test/java/org/apache/maven/it/MavenITgh11314PluginInjectionTest.java

@@ -29,6 +29,8 @@
  * implementations. Specifically tests the case where a plugin needs to inject ToolchainFactory
  * with a named qualifier.
  *
+ * This IT manually manages {@code .mvn} directories, so instructs Verifier to NOT create any.
+ *
  * @see <a href="https://github.com/apache/maven-toolchains-plugin/issues/128">maven-toolchains-plugin#128</a>
  */
 public class MavenITgh11314PluginInjectionTest extends AbstractMavenIntegrationTestCase {
@@ -45,6 +47,13 @@ public class MavenITgh11314PluginInjectionTest extends AbstractMavenIntegrationT
     public void testV3MojoWithMavenContainerInjection() throws Exception {
         File testDir = extractResources("/gh-11314-v3-mojo-injection");
 
+        // Before, build and install the parent POM
+        Verifier parentVerifier = newVerifier(testDir.getAbsolutePath(), false);
+        parentVerifier.addCliArgument("-N");
+        parentVerifier.addCliArgument("install");
+        parentVerifier.execute();
+        parentVerifier.verifyErrorFreeLog();
+
         // First, build and install the test plugin
         File pluginDir = new File(testDir, "plugin");
         Verifier pluginVerifier = newVerifier(pluginDir.getAbsolutePath(), false);